Tuesday I practiced with them and Kayley was getting better but still couldn't start by herself and Olivia still couldn't really do it without me hanging on. Then yesterday we tried again and at first it was the same, but after awhile Kayley was able to start by herself and then so could Olivia! Now they can both ride their bikes without training wheels! Good job, girls!
Here's a video of Kayley. I took one of Olivia, too, but she's already way better than in the video so I'm going to take a new one next time they ride.