Maddie goes for a fun day out. She visits a fairground and goes for a ride on a carousel, using a special camera to find out how it works. An animation shows how the carousel goes round and how the crankshaft works to move the horses up and down. Next, Maddie visits a factory to see how different coloured wax crayons are made from paraffin oil and how a big mold creates hundreds of crayons in one go.
