Attention to detail makes Ravensburger the world's greatest puzzle brand. Quality your child can grow with - piece by piece. All puzzle pieces are extra durable to withstand the demands of little hands. Our puzzles help your child to develop hand-eye coordination, fine motor skills, problem solving, shape recognition, memory, task completion and independent play. A child's brain development is positively influenced when a child acts on or manipulates the world around him or her. Puzzles provide that key opportunity. Cretaceous, Jurassic or Mesozoic??