My DD, having 8 & 10 year old siblings and not wanting to be left behind, has been competently riding a 3 wheel razor since about 18 months. She will be 3 next week and rides their 2 wheelers no problem. I won't let her ride their electric scooters alone, but she does stand in front of her brother or her sister and zooms around! Your DD will be fine, especially if she already rides a 3 wheeler. I hope Santa brings her a 2 wheeler