Lets Tackle Math! Patterning & Sequencing Set...Make patterning practice as much fun for kids as playing in their own backyards. This 252-piece counter set features 72 each of colorful worms and frogs and 108 bugs to use in patterning exercises. Counters can also be sorted by color, shape and size. Includes a 25-page, spiral-bound Activity Book filled with 48 engaging, self-checking activities; sorting tray and sturdy tackle box for easy storage.