Same situation as x 2. Both daughters rode a trail-a-bike and skipped training wheels. Both learned to ride in 10 minutes. Take the pedals off. Find a very small hill or slight slope with a grassy surface and no traffic. Let your daughter coast downhill a few times to get a sense of balance (which they lack because of the trail-a-bike). Then put the pedals on and let her coast down a few more times but using the pedals to brake. Finally, have your daughter start pedaling and gently turning as she rides downhill. Guaranteed success. Good luck.