Wooden rainbow toy arch stacker from wood gift for child nursery decor mustard stylish toys Rainbow toy is one of the most popular toys. Its minimalistic design encourages children to use their imagination to the fullest and that is why this toy may be used in variety of games. How is rainbow toy useful? With arch stacker child developes coordination and hands fine motor skills. Smaller children first play with it like with puzzle: they learn the sizes and try to assemble full rainbow from 7 archs. Later, child learns colours and notions "bigger" and "smaller" / "taller" and "shorter" / "wider" and "thinner" etc. And more grown up kids find out how balancing works and develope concentration: they take the biggest arch, put it upside down and try to build the stable construction on it from other archs.