It’s never too early to start exploring big ideas. This companion volume to 'My First Book of Quantum Physics' introduces complex science to children through bright illustrations and amusing text. Einstein’s theory of relativity is one of the cornerstones of modern physics but it requires a total rethink of our notions of time and space. Strange things happen in a relative universe: length and time are not fixed and depend upon your frame of reference. If you move at high speed, time slows down, space contracts and weight increases.