Introduction

Meet the STEM-Lab Mouse—a science-loving amigurumi with a neat blouse and pleated skirt, a classic beret, and a translucent backpack filled with test tubes. Stage the scene with a tiny clipboard, Bunsen burner, and a test-tube rack for irresistible photos. Pattern uses US crochet terms and continuous rounds unless stated.

Please note: I strive for accuracy in every pattern, but occasional errors can happen. Thank you for understanding and for enjoying my designs.

Materials

• Yarn (Worsted/Aran #4 cotton or cotton-blend):
  1. A: Light gray (head, body, arms, legs, tail, ears outer)
  2. B: Peach/blush (ear inner)
  3. C: Cream (blouse, shoe foxing/soles, beret, backpack shell)
  4. D: Neon-coral/orange (collar piping, blouse buttons, belt line)
  5. E: Lavender (skirt)
  6. F: Medium gray (sneaker uppers, burner base)
  7. G: Dark gray (burner stem details)
  8. H: Yellow (test-tube fill & flame highlight)
  9. I: Sky blue/cyan (test-tube fill)
  10. J: Brown (cork stoppers, test-tube rack)
• Hook: 3.25–3.5 mm (US D/E) for firm fabric; optional 2.75–3.0 mm for minis.
• Notions: 10 mm safety eyes (pair), stitch markers, tapestry needle, fiberfill, small cardboard ovals for shoe reinforcement (optional), thin plastic sheet for backpack windows (optional; crochet version provided), a touch of blush.

Finished Size & Gauge

• Finished height: ~10.5–11.5 in (27–29 cm) including beret.
• Gauge: ≈18 sc × 20 rows = 4 in/10 cm in the round with firm stuffing.

Abbreviations (US Terms)

• MR – magic ring
• ch – chain
• sl st – slip stitch
• sc – single crochet
• hdc – half double crochet
• dc – double crochet
• inc – increase (2 sc in same st)
• dec – invisible decrease (front loops)
• blo/flo – back/front loop only
• sc3tog – single crochet 3 together
• rep – repeat
• st(s) – stitch(es)

Pattern Notes

• Work continuous rounds unless a row/turn is specified.
• Stuff firmly for head/feet; moderately for limbs/body; lightly for muzzle/ears.
• Keep color map consistent with the photo (see next section).
• Safety: embroider eyes for under-3s; secure small props.

Color Map (exact to photo)

• Mouse: A with B inner ears, tiny nose/mouth in G or dark brown.
• Beret: C
• Blouse: C with D piping/buttons
• Skirt: E
• Shoes: F uppers; C soles/foxing/straps
• Backpack: C body with “clear” effect; tubes I & H with J corks
• Props: burner F+G with H flame; rack J with tubes I & orange mix (H+D)

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Main Mouse

Head (A)

R1 MR 6 sc (6)
R2 inc around (12)
R3 [sc, inc]×6 (18)
R4 [2 sc, inc]×6 (24)
R5 [3 sc, inc]×6 (30)
R6 [4 sc, inc]×6 (36)
R7 [5 sc, inc]×6 (42)
R8–12 sc around (42)
Place eyes between R10–11, 8 sts apart.
R13 [5 sc, dec]×6 (36)
R14 [4 sc, dec]×6 (30) — start stuffing firmly, shaping cheeks.
R15 [3 sc, dec]×6 (24)
R16 [2 sc, dec]×6 (18)
R17 [sc, dec]×6 (12)
R18 dec around (6). Close, weave in tail.

Muzzle (A)

R1 MR 6 sc (6)
R2 inc around (12)
R3 [sc, inc]×6 (18)
R4 sc around (18). Stuff lightly; sew centered two rounds below the eyes. Embroider a tiny triangle nose and short mouth line.

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Ears ×2 (A/B)

Outer (A): R1 MR 6, R2 inc around (12), R3 [sc, inc]×6 (18), R4 [2 sc, inc]×6 (24). Do not stuff.
Inner (B): R1 MR 6, R2 [sc, inc]×3 (9), R3 [2 sc, inc]×3 (12), R4 [3 sc, inc]×3 (15).
Whipstitch B centered onto A. Fold slightly at base for a cupped ear.

Body (A)

R1 MR 6 (6)
R2 inc around (12)
R3 [sc, inc]×6 (18)
R4 [2 sc, inc]×6 (24)
R5 [3 sc, inc]×6 (30)
R6–9 sc around (30)
R10 [4 sc, inc]×6 (36)
R11–13 sc around (36)
R14 [4 sc, dec]×6 (30)
R15 [3 sc, dec]×6 (24)
R16 [2 sc, dec]×6 (18)
R17 [sc, dec]×6 (12)
Finish stuffing; R18 dec around (6). Close.

Arms ×2 (A)

R1 MR 6 (6)
R2 inc around (12)
R3–6 sc around (12)
R7 [4 sc, dec]×2 (10)
R8–15 sc around (10). Lightly stuff from palm to mid-arm.
Flatten; R16 5 sc across both layers to close. Leave long tails.

Legs & Shoes (worked together)

Soles (C)
R1 MR 6 (6)
R2 inc around (12)
R3 [sc, inc]×6 (18)
R4 [2 sc, inc]×6 (24)
R5 sc blo around (24)
R6–7 sc around (24)
R8 [2 sc, dec]×6 (18) — start forming toe box.

Uppers (F)
Join at R5 front-loop ridge.
R1 sc around (24)
R2 [6 sc, dec]×3 (21)
R3 sc around (21)
R4 sc 7, ch 3, sk 5 (tongue gap), sc 7 (17)
R5 sc around (17)
R6 sl st around for a crisp edge.
Tongue (F): join at gap, Row1 ch1, 5 sc; Row2–3 sc across.
Laces/Straps (C): ch 26; weave through tongue edges and tie bows.

Ankles/Legs (A)
Rejoin A at heel top.
R1 [sc, dec]×6 (12) — stuff foot firmly.
R2–7 sc around (12)
Flatten; R8 6 sc across to close. Leave long tails for sewing.

Tail (A)

R1 MR 5 sc (5)
R2–24 sc around (5) — work long enough to reach ankle; lightly stuff with yarn tails; leave tail for sewing.

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Clothing

Cream Blouse with Peter-Pan Collar (C + D)

Bodice (flat then joined)
Row1 ch 31; sc in 2nd ch and across (30).
Rows2–4 ch1, turn, sc across (30).
Row5 (arm splits) sc 9, ch 3 (skip 4), sc 8, ch 3 (skip 4), sc 9.
Rows6–10 sc across (30).
Join short back seam; slide on from feet.

Sleeves ×2 (in the round)
Join C in armhole.
R1 ~18 sc evenly; R2–3 sc around for short sleeves; fasten off.
Front Placket: surface-sl-st a vertical line at center front.
Buttons (D): make three yo-yo dots (MR, 5 sc) and sew along placket.

Peter-Pan Collar (C edged D)
Join C at center back neckline.
Row1 (flat) [sc in next 5, inc] ×6 around to center front (approx. 36).
Row2 ch1, turn, sc across; fasten off.
Edge entire collar with D surface-sl-st to mimic piping.

Lavender Pleated Skirt (E)

Worked as a rectangle then joined; pleats formed with blo/flo ridges.
Row1 ch 66; sc in 2nd ch and across (65).
Rows2–5 sc blo across (65).
Rows6–7 sc flo across (65).
Rows8–11 sc blo across (65).
Rows12–13 sc flo across (65). (This sequence creates alternating ridge pairs for crisp pleats.)
Repeat Rows8–13 once more for length.
Join short edges to form a tube.
Waistband: round of sc on top edge; then one round D sl st to create the thin coral belt line visible in the photo. Slide on from feet; sit at natural waist.

Cream Beret (C)

R1 MR 6 (6)
R2 inc around (12)
R3 [sc, inc]×6 (18)
R4 [2 sc, inc]×6 (24)
R5 [3 sc, inc]×6 (30)
R6 [4 sc, inc]×6 (36)
R7 [5 sc, inc]×6 (42)
R8 sc around (42)
Band: R9 sc blo around (42)
R10 [5 sc, dec]×6 (36)
R11 sc around (36). Fasten off; steam to flatten the top slightly.

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Backpack with Test Tubes (C + windows, J corks, I/H fills)

Body (C)
R1 ch 21; sc in 2nd ch and across (20).
Rows2–5 ch1, turn, sc across (20).
Sc around perimeter; this is the base.
Round1 (up walls): working around base, sc one st per edge st (≈60).
Rounds2–10 sc around (60) shaping a soft rectangle.
Top Curve: R11 [8 sc, dec]×6 (54)
R12–13 sc around (54).
Pocket Frame: On front panel, surface-sl-st a rounded rectangle. Option A: applique a thin clear plastic window behind frame. Option B (fully crochet): fill the window with open mesh—ch1, [sc, ch1, sk1] repeated—then border with sc.

Zipper-look edging: one round of slip stitches in D along the opening.
Straps: Make 2—ch 36; sl st back; sew from top to bottom corners.
Handle: ch 18; sl st back; attach at top.

Test Tubes ×2
Tube (I or H): MR 4 sc; work 2 rounds even; then R3 inc 2 evenly (6); R4–8 sc around (6).
Rim (C): join and work 1 round sl st; fasten off.
Cork (J): MR 5 sc; next round sc around; sew to tube mouth. Place tubes into pocket and tack lightly.

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Lab Props

Clipboard (C + J + blue linework)

Board (J): Row1 ch 16; sc 15. Row2–6 sc across.
Paper (C): ch 14; sc 5 rows; whipstitch onto board leaving top open.
Clip: small oval in F; sew at top center.
Doodle: embroider a simple blue “atom” symbol and lines.

Bunsen Burner (F/G/H)

Base (F): R1 MR 6; R2 inc (12); R3 [sc, inc]×6 (18); R4 sc blo (18); R5–6 sc around (18).
Stem (G): R1 join at center top, 8 sc; R2–5 sc around (8).
Flame (H + D): R1 MR 4 sc in H; R2 [sc, inc]×2 (6); R3 sc around; switch to D and sc2tog twice (4); stuff lightly; sew atop stem.

Test-Tube Rack (J + C)

Bar 1 (J): Row1 ch 26; sc 25; Row2 sc across—make 2 bars.
Posts: make 2: MR 5 sc; work 4 rows flat as tiny rectangles.
Sew bars to posts at top/bottom to form a frame.
Tubes: copy the tube pattern above; one orange, one cyan; stitch into rack.

Mini Lab Mice (A + tiny)

Small Mouse (~5 cm):
Head/Body combined: MR 6; [inc]×6 (12); 1 rnd even; [sc, inc]×6 (18); 1 rnd; [sc, dec]×6 (12); stuff; [dec]×6 (6).
Ears: MR 5 sc ×2; sew. Nose in pink; bead eyes or embroidered.
Tail: ch 18; sl st back; attach.
Micro Mouse (~2 cm): MR 4; [inc]×4 (8); 1 rnd; [dec]×4 (4); close; add knot ears and a 12-ch tail.

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Assembly – Exact Placement

1. Head ↔ Body: Pin, then whipstitch; add a bit of stuffing under the neck.
2. Ears: Sew symmetrically on head sides just under beret edge; slight forward tilt.
3. Arms: Attach at upper torso so hands rest at hip height. Tack left hand to the clipboard edge.
4. Legs/Feet: Sew at body base with feet parallel and ~1 cm apart; check standing balance.
5. Tail: Sew at center-back low, pointing slightly downward then sweeping back.
6. Dress: Put blouse on, then skirt (waistline coral stripe visible).
7. Beret: Seat level; band just above ears.
8. Backpack: Center on back; secure straps over shoulders; tack lower strap ends at waist. Insert tubes and close pocket edge with a few hidden stitches so tubes show.
9. Props: Place burner and rack to the mouse’s right; minis near feet, larger mini closer to viewer.

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Face & Finishing

• Add a tiny white eye highlight stitch; brush cheeks with soft blush.
• Steam-shape skirt pleats and beret (hover iron; do not press acrylic).
• Weave all ends; secure bows/straps with tiny invisible stitches for durability.

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Quick Photo-Match Checklist

• Light-gray mouse with peach inner ears ✔
• Cream beret, level on head ✔
• Cream blouse + coral piping & three coral buttons ✔
• Lavender pleated skirt with coral waistband line ✔
• Gray sneakers with cream foxing & strap laces ✔
• Cream translucent backpack with two tubes (blue & yellow) ✔
• Clipboard with blue atom sketch in left hand ✔
• Bunsen burner (gray base, orange flame) + wooden rack with orange & blue tubes ✔
• Two mini mice props on tabletop ✔

Enjoy crafting your STEM-Lab Mouse—a science scene that’s irresistibly cute and perfect for photos!