She'll get it in her own time. No hills are required. Both of my daughters learned out on the city sidewalk...just playing with their bikes. One learned in a few days...the other took a few weeks, and they're twins. Just leave the pedals off and let your child glide around for several days, at her leisure. The beauty of this method is no parental intervention/stress/presure on the child is needed. One day, you'll look up and see your child gliding thru turns like a pro, that's when you put the pedals on. Remember when she learned how to walk, I'll bet she did it on her schedule.

Best of luck !!!!!!!