Critical thinking—on the go! Set of 20 piece includes 3-piece storage case with removable tray, 16 puzzle pieces, and a puzzle book with ten different types of games and puzzles. Multiple types of critical thinking challenges offer a variety of play options.Pieces and puzzle book store easily inside for quick pack and play. Multiple types of critical thinking challenges offer a variety of play options for 1 or 2 players.” Measures 6¼” x 6¼”.