3 yrs. & up. Push two blocks together and they connect so easily even the youngest builders find creative success! It doesn’t take long for them to realize that Bristle Blocks fit together in every way. Includes 8 square hollow pieces, 8 triangle, 22 rod pieces, 4 domes, 2 long rectangles, 4 short rectangles, 24 squares, 28 circles, 4 pyramid, 8 rubber wheels.