bBlock N Roll 60 Piece/b demonstrates cause and effect while stimulating creativity. Set includes: 10 straights, 12 ramps, 8 corners, 4 start/stops, 4 cross-overs, 2 drop-thru's, 20 Dimple Blocks, 1 base plates, 10 marbles.Starter Set Attaches to Duplo construction blocks Teaches manipulative and basic problem solving skills Great for classroomsAges 6 and up.By Taurus Toys