The crank cruiser
Inventors (Intermediate), mission I5 Wheels & Measuring, lesson 1 of 6.
Hook
Turn a handle, the car drives. How far for one turn?
Fair test
Mark the tyre with tape. Measure the distance for 1, 5 and 10 cranks.
Bonus challenge
Drive it round an obstacle course using only counted cranks, no looking!
The build
- 🎡 Crank Cruiser: Turn the handle and the car rolls — every turn of your hand spins the wheels three times! (level 2 of 5, about 18 minutes, 9 steps)