I will give some consideration to a BOB for a nine year old girl. That should stretch my imagination. But Sassy is so ahead of the curve in so many ways she would probably accept and appreciate a lot of ordinary and pragmatic survival kit suggestions. Her inhaler is #1 on the list. A fresh one. Your kit sounds like a very good start.
I forget too but I remember it as being pretty funny. I think she had her bug net & case for insects. Her inhaler & tea tree oil. When we were camping she kept a old CD in her bag to flash if she got lost. I might be able to find it out in the trailer. I hope there isn’t a dead frog or toad in her bag.