Watch math skills soar as kids master numbers -20 to 120! Playful Owl-Stars!® introduce children to positive and negative numbers (even and odd) and inspire endless math games and activities. Includes 14 strips of 10 numbers plus 4 sliding houses, a zero piece, 12 odd and even labels, 6 Owl-Stars!® Clips, 6 flying Owl-Stars!® accents, and 6 Dancing Stars accents. Complete line 40´ long. 49 pieces, up to 34 1/2". Includes a Discovery Guide with creative activities that teach and delight! Coordinates with Owl-Stars!® Collection.