Turn one gear — see mesh, reverse direction, and speed ratio

This wooden gear transmission model makes mechanical drive visible: teeth mesh, adjacent gears reverse, large and small gears show speed ratio. Non-electric and magnet-free — ideal for primary/secondary science demos or a home STEM desk.

Unlike a motorised gear toy, the learning is in observing, predicting, checking, and recording. When a child turns the driver and watches the follower reverse, questions like “why opposite?” become the best STEM starting point.

Who is it for? Age & STEM skills

Suggested age 7+. Warning: not for under 3 (small parts). Great for simple-machines lessons and ratio thinking — not a plug-and-play light-up toy.

• Science — transmission, mesh, friction, force transfer
• Math & logic — tooth ratio, cycles, direction reasoning
• Engineering habits — observe–predict–verify
• Communication — explain direction and speed changes aloud

How to explore

1. Check gears and hardware; ensure free rotation.
2. Turn the driver slowly; track the follower’s direction.
3. Note that adjacent gears usually reverse.
4. Count turns to sense speed ratio between large and small gears.
5. Predict what happens with an extra gear; draw arrows and test.
6. Keep a tiny lab note of arrows and counts.

In the box

• Wooden gear set (tooth count and pieces as shipped)
• Mounting hardware / related parts (as shipped)
• Instruction guide (language and exact count as shipped)

Parent FAQ

Q: Batteries or motor?
A: No — fully non-electric (no motor, battery, or magnets). Do not motorise.

Q: What age?
A: 7+ with adult help for first setup.

Q: Is this an animal-theme toy?
A: No — gears-only mechanics demonstrator; no character IP.

Q: Difference from electric gear toys?
A: Those emphasise instant play; this emphasises seeing mesh and explaining principle.

Safety tips

• Ages 7+; adult supervision for first use.
• Small parts — not for under 3.
• Keep fingers clear of meshing teeth; do not add powered parts.
• Keep parts out of mouths; store dry.

A clear wooden demonstrator — turn it, see it, explain it.