67 Piece Marble Maze Building Set Set includes 67 durable colored pieces, (Includes 30 bonus marbles, 1 paddle wheel, 6 curves, 6 chutes, 3 bases, 1 bell, 1 squiggle pass, 1 rotary drop, 1 slope run and 17 chutes) Design simple or complex structures while developing creativity, logic and understanding of cause and effect Children and adults 4 years and older