These rainbow building boards will let kids engage in placing the blocks in a myriad of creative ways and busy for hours. Perfect fit with wooden rainbow stacker as an open-ended learning educational toy for kids, baby, toddlers. This toys can capture the imagination while improving children’s knowledge of the world, expand their reasoning, creative abilities, fine motor skills, and patience, also an ideal gift for birthday, Christmas Day, Halloween, New Year Size: 11 Colors Rainbow Rectangle: 15 IN (L), 2.8 IN (W) 11 Colors Rainbow Semicircle: 14.6 IN(D), 7.3 IN (R)