Designed to match your child’s developmental milestones, the Mini 3in1 Deluxe grows as your child grows: Stage 1: Ages 1 to 2, children sit with feet on the ground to scoot. The seat can be raised as little ones grow. Non-marking wheels allow it to be ridden indoors. Stage 2: Around age 2, your child will want to stand to scoot. By removing the seat, your child can stand and ride using the shorter O-bar. Stage 3: Ages 2 to 5, when your child is ready for taller scooter, convert to our Mini Deluxe Scooter with T-bar, included in box.