Ravensburger Mountain Duel 100 Piece Jigsaw Puzzle for Kids &ndash; Every Piece is Unique, Pieces Fit Together Perfectly HIGH QUALITY COMPONENTS  Ravensburgers jigsaw puzzles for kids will bowl you over with premium quality, in terms of both content and material. PRECISION FIT  No matter how large or small our puzzles, each is precision made so that every piece fits perfectly. EVERY PIECE IS UNIQUE  None of the frustrations you find with other puzzle brands. With Ravensburger, every individual piece has a completely unique shape. PERFECT FOR YOUR CHILD  Jigsaw puzzles help support a childs development as they play, building skills such as concentration and creativity. LONG TERM QUALITY - Ravensburger has been making products for the hand, head, and heart for over 130 years.