Transform and recycle household objects into your very own home-made toys and machines! Learn about the centre of gravity by making a balancing bird, create a toroidal vortex with a smoke-ring machine, and turn a spoon into an electromagnet. Chances are you won't need to buy the materials required for these machines because they're all in your house right now. Every child can be an engineer with the help of Mr Shaha and his marvellous machines. Written by a science teacher and dad, Mr Shaha's Marvellous Machines is the highly anticipated sequel to Mr Shaha's Recipes for Wonder. This book gives clear, step-by-step instructions for over 15 projects. Whether you're a master engineer or a total beginner, it will spark inspiration for fun activities to engage young people in the marvels of machinery.