Great for indoor or outdoor use, this 89 piece set is made from FSC certified eucalyptus wood and weathers to a soft gray if left outdoors. Blocks feature smooth sanded edges and notches that lock together allowing for big structures and endless building possibilities. With blocks of varying shapes and sizes, there are plenty to share, encouraging group participation. Ages 3+. Smallest block measures 6"L x 3"W. Largest block measures 30"L x 3"W.