Below you'll find things to make at home and experiments that need your help. Ballooning's a leisurely pastime that has never been more popular. You can have a go at making your own miniature version with this simple design.
Nothing is infallible it seems.
Speaker are designed to convert electric signals into sound we can hear. Have a go at making your own speaker to find out how simple it really is. I want to make a working mock up to demonstrate the principle. Thomas Newcomen invented the first successful steam engine, make your own at home from a tyre pump. Mess about with boats and discover the principles behind steam power.