The Fisher Price Jumperoo Deluxe is the greatest baby product for keeping the baby content while also providing fun, activity and strengthening. My son was very active and would never sit still in most stationary products. He was very active and enjoyed jumping up and down and pressing the buttons to activate the lights and sounds. The Jumperoo can be used starting at 4 months and used even after 1 year depending on your child's weight. There are 4 levels to make the Jumperoo higher as your child grows. Your child should be able to hold their head strong enough on their own before allaoing them...