Lovevery® combines the best of neuroscience and Montessori philosophy to create stage-based toys that support your child's brain development. The Montessori Rolling Rattle will engage your child-and build important milestone skills- starting at 12 weeks. A fresh take on a Montessori bell rattle, this play essential will make tummy time easier and strengthen your baby's visual tracking. Be amazed by all your child can accomplish-and have fun learning together through stage-based play. Includes a free Digital Play Guide and access to expert content with purchase. Number of Pieces: 1 Dimensions (Overall): 4.33 Inches (H) x 3.15 Inches (W) x 3.15 Inches (D) Weight: 3 Pounds Suggested Age: 0-6 Months Educational Focus: Fine Motor Skills, Physics Material: Wood Battery: No Battery Used