Can anyone recommend a scooter for a 3/4 year old, that has a fixed front wheel so doesn't steer? DD has a scooter (one that goes from 4 wheels to 3 to 2), but can't learn to ride because she just can't keep the handlebars straight. I've run out of patience, so thought if I could get her one that doesn't steer, she could start wth that to build up her confidence. Any thoughts?