More recent studies continue to show that infant vision capabilities include color vision for high contrast colors like black white. This little black white rattle is a sensory toy for babys starting to grasp. Easy to grip even with the smallest palm! Baby can feel different shapes and listen to the rattle sound from shaking the rattle ring. This is also safe for baby to chew when teething, helping to soothe babys sensitive gums. All wooden pieces are polished with an organic coconut oil and beeswax balm to protect it from drying out. It can be repolished using coconut oil found at home. Babys name laser engraved (only heat, no nasty chemicals) in the beech wood, adding the perfect finishing touch and creates a truly unique, memorable keepsake for your little one or the perfect gift! LEAVE ME A NOTE ON CHECK OUT WITH THE BABYS NAME ( DOB) CARE: Wipe with a damp cloth. Do not submerge in water. It is highly recommended that you retreat the wooden beads from time to time. This is easily done with any food grade oil. SAFETY: Potential choking hazard. Contains small parts, use only with supervision. Inspect an item upon receiving it and contact us immediately if you notice any damage on the item. Clean before first use. Note: Because these items are handcrafted such may vary slightly in length and bead placement.