Puzzle Play Hollow. Just like a puzzle this play center clicks together creativing a fun learning environment for toddlers. Designed by Children's Factory this soft play center is perfect for indoor use in a daycare setting or pre-school. 3-D Puzzle Play Forms Features, Molded polyethylene plastic for indoor and outdoor use. UV inhibitor holds color in sunlight. 6 Pieces designed for inter-changeability. Flip Puzzle Curve to change direction. Flip Puzzle Straight solid surface on one side, storage on the other. Height designed just under 12" for age appropriate use. 12"-15" safety wide surfaces. Interlocking puzzle ends hold fast with no pinch points. Lightweight portability. Excellent seating height for all ages. 8 straight puzzle pieces, 4 puzzle curve pieces form a play center around our soft expanded vinyl checkerboard mat.