The Floating Needle
The Floating Needle What will happen if you put a needle in a cup of water? It would sink. But you can do it if you use density. Things you’ll… Read more The Floating Needle →
Amazing Paper Planes
Amazing Paper Planes Tried of the same old paper airplane designs? Try these two unusual ones. 1. Straw Plane Things you’ll need: one strip of paper 1.5 cm x 9… Read more Amazing Paper Planes →
The Moebius Strip
The Moebius Strip You’ve probably heard the expression, “There are two sides to everything”. But are there? You can find out by making this strip. Things you’ll need: several strips… Read more The Moebius Strip →
How to Make a Periscope
In 1854 Hippolyte Marié-Davy invented the first naval periscope, consisting of a vertical tube with two small mirrors fixed at each end at 45°. Simon Lake used periscopes in his… Read more How to Make a Periscope →
