$10 to $20

Learn how paper is made and make your own recycled paper from scraps of paper, vegetables, grass and leaves!

You can not see him, but you see what he knows how to do and you really can not do without him. Get to know the secrets of electricity!

Let the sun take you wherever you want, with a car that can travel with the help of solar energy only!

What allows ships to float and how do submarines work? Learn the hidden secrets of buoyancy.

Learn how the seeds germinate and find out for yourself what are their favorite conditions to become plants!

Discover the power created by air pressure differences and make your own home vacuum cleaner