Hape Twiddler Double Dilemma Brain Teaser Fidgeting Puzzle Get addicted to brain fitness with Twiddler workouts Two circles overlapping create brain straining opportunities, start with 3 or 4 colored pieces and add more as you master the puzzle. Includes 63 pieces total Promotes logic, problem solving, and creativity Recommended for ages 10 years and up Non-toxic finishes and child safe materials