abstract appearance appearances blocks child-care children's-toys color coloration colored colorful colors colour coloured colourful colours connecting fit fitting foam-rubber games learning mixed mix’n-match playing-blocks puzzles shape shaped shapes soft sponge-rubber tactile texture textures touch touching toys variations variety ball circular spikes spiky artificial broken comfort comfortable-materials cushion-stuffing cushions fibers filling foam foam-stuffing fragments low-density pieces pillow-stuffing plastic polyester polymer polymeric-foam recycling reusable separate stuffing surface surfaces synthetic