Learning Resources Gears! Gears! Gears! Mega Builds Construction Set. This is the ultimate Gears! Gears! Gears! set and is ideal for the classroom or at home. With 225 pieces including colourful gears, wheels, treads, and propellors, children can create, design, and build basic machines that twist and move. Using gears to create and build encourages logical thinking, spatial reasoning, and creative problem-solving. Features multilingual packaging and build guide. The smallest gear in the set measures 6cm in diameter. 235 Piece Set.