US$ 22.00
Safe for your child - we conduct more than 1
4 levels of difficulty - Easy
You can alter the gears using the transmission fork to observe how the speed varies between the drive and driven pulleys
You could count the number of cars that pass in front of your house in an hour
Smores Teacher Ornament Safe for your child -
US$ 22.00
US$ 24.00
US$ 24.00
US$ 30.00
US$ 24.00
US$ 42.00