Of the pasteboard or white holly cut out eight squares of whatever size desired; divide four of them into halves by cut…

In this puzzle, the pieces composing the cross may be made of pasteboard, but are better and stronger if made of the wh…

This puzzle consists of twelve irregular pieces of stiff pasteboard or wood, which are to be arranged in the form of an…

When you pump up your bicycle tires or football, you are making use of compressed air. Inside a bicycle pump is a sma…

Blow up a balloon and then let it go. The force of the high-pressure air coming out of the neck makes the balloon ru…

How to Make a Pinwheel? You will need: a pencil a ruler a piece of thin cardboard, 4 in x 4 in (10 cm x 10 cm) a…