We didn't want to get a tricycle - we already have one in the garage that a neighbor lent us. It has a handle on the back, which is nice, but it seemed to encourage B not to peddle. So, this is what we found:
B likes to watch her feet instead of where she is headed.
She really didn't want me to take her photo.
"Did the wind miss up my hair?"
She is doing OK with the bike. She rode it home (most of the way) and around the block in the afternoon and then to the park. There are a lot of inclines she needs help with and B need help with steering.