See Inside How Things Work (IR)Have you ever wondered just what happens when you flush a toilet, or what goes on inside a light bulb? Do you want to know how a digger scoops up soil, why boats float and what keeps planes up in the air? Lift the flaps to see inside how things work from everyday inventions to massive machines. Series: See Inside Board Books Packed with lively illustrations and fascinating flaps, these books are bursting to reveal amazing secrets.