This 22-piece marble run for toddlers can be assembled quickly into different runs by joining the brightly coloured parts in several ways, thanks to its interlocking design. It comes with three large, 4.5 cm diameter marbles that rattle as they go intentionally slowly down the track, in order to prolong the magic and the surprise for your child. This run will stimulate children to experiment to find fresh solutions, to observe with interest the world around them, and to try out ideas through trial and error. This toy is designed to encourage your childs fine motor skills, creative thinking, hand-eye co-ordination and learning cause and effect. Suits ages 18 months +.