Kumon Step-Up Jigsaw Puzzle Step 4 : TrainsKumon Toy Educational Toys Step Up Jigsaw Puzzle Step 4: Trains This Small Step jigsaw puzzle set helps develop concentration and work efficiency, encouraging learning through play. The STEP 4 set includes 3 jigsaw puzzles, with piece counts ranging from 54 to 88 pieces. By gradually increasing the number of pieces, children can improve their focus, perseverance, and problem solving skills, while experiencing a sense of achievement upon completing