This jumbo set of building gears will keep children entertained for hours inside the useful storage tub are 150 colourful gears cranks connectors and interconnecting base plates to allow endless creations to be designed and made this is a creative construction toy which is not only educational but lots of funbuilds fine motor skills encourages the imagination develops problem solving skills spatial awareness awardsgood toy guide gold award winnerpractical pre school gold award winnerdimensi