Springbok Alzheimer & Dementia Jigsaw Puzzles - Bluebirds - 36 Piece Jigsaw Puzzle - Large 18 Inches by 23.5 Inches Puzzle - Made in USA - Extra Large Easy Grip Pieces Springbok puzzles feature unique interlocking pieces No two pieces are alike making each Springbok puzzle a unique challenge Springbok puzzle pieces are 18% thicker than the industry average