Made of hardwood and is designed for INDOOR USE ONLY. Conforms to ASTM and CSPC Indoor Play Equipment Guidelines. Assembly Required. Dimensions 10.375 x 10.25 x 3.375 This forty year old company features a tradition of smart, beautifully hand-crafted wood products, which allow children's minds and imaginations room to truly wonder and grow. Their best contributions lie in commitment to continue doing what they do best, always giving loyal customers what they have come to expect; expert quality, excellent service and an ever growing collection of creativity inspiring products for children. This wonderful line is a favorite of schools, home schools and personal playrooms.