Balance and stack these stunning Natural Buttons! Made of smooth Beech wood, this 7-piece wooden set is suitable for all ages. These balancing rocks have flat surfaces and graduated sizes for stacking and balancing activities. An imaginative set for open-ended play, these wooden stones feature natural colors and wood grain. These tactile, multi-sensory pebbles endless fascinate babies and toddlers with their smooth texture. || Size of smallest button: 1.9”W. Size of largest button: 5.5”W.