These magnetic foam blocks are truly addictive. Each time they are clicked together building satisfaction is reinforced. Blockaroos large size is designed to be easy for young children to play with. The soft material means play is safe, even if the blocks take a tumble. Lightweight construction means parts stay together for imaginative play. The blocks float! Patented magnet design allows magnets to always attract. Wanna clean these blocks after a bunch of play? No problem, just throw them in the dishwasher! For ages 18 months and up.