Between sitting and walking a baby passes through several stages, and this walker covers four of them: seated walker, push walker, floor activity toy and rolling toy car. Three heights from 20" to 22" keep the fit right as legs lengthen. A safety bumper and non-slip stair pads guard against knocks and steps, while the removable seat cushion washes easily. It folds to 11" thick for storage. For 6 to 18 months with a 25 lb capacity. Requires two AA batteries, not included. Net weight 10 lbs.