GENIUS , Slides / Slider Slippers , Black Size:UK : 7 ~ EURO : 41 A double planetary gear reducer

A double planetary gear reducer with differently shaped gears provides the necessary speed

2 in (21*21*26 cm)

It's equipped with a rubber-band engine with a removable key

It's a great educational project as kids can learn about agriculture

GENIUS , Slides / Slider Slippers , Black Size:UK : 7 ~ EURO : 41 A double planetary gear reducerGeekdawn brings you these unique printed slides slippers. Choose from multiple variety of designs to quench your Geeky thirst. For chill days, casual outing and beyond, this pair of sliders from Geekdawn are perfect. Slip into 'em for maximum comfort and style! Please refer to the size chart in the product images to avoid any size related confusion. Just in case the size doesn't fit, please place an exchange order and we will replace the t shirt for