Find out which object belongs to which object by feeling! Touch one object on the wooden panel, which contains a soft mirror with a different fabric texture. Then, without looking, take an object with the same structure from the bag. Shake the orange and green cubes and discover that they have different sounds. That's not all: mix the three primary colors red, blue and yellow to discover which color you get.
Three senses are developed when playing with the blocks: hearing, feeling and seeing.