The Evolve Bouncer is usable from birth (minimum 5lb 8oz/2.5kg) with our ergonomic newborn insert. The newborn insert is usable up until 12lb. The infant mode is usable from birth to 20lbs/9kg or when baby begins to sit upright. The toddler mode is usable from when child can get in and out themselves until 29lbs or 13kg.