3 years & up. Encourage your children to practice patterning with these fun Practice Pattern Blocks Puzzle Picture Cards for Activities. These activity cards are a great accompaniment with pattern blocks. Encourage children to identify the shapes and colors as they place the pieces. These cards promote fine motor skills, problem solving, patterning, and color recognition. Includes 20 double-sided cards with 2 levels of difficulty. Pattern blocks sold separately. Measures 11.75"L x 8.25"W.