Paid for nothing

I just bought one of the mysteries for my five year old but when it goes to download, the app crashes. Tried it five times.
The worst part is, she was so excited and now shes disappointed.
Please fix this!
I am on a first gen ipad, and if it is not compatible, it should have stated before I handed over my money.

Disease Queen about Toontales - Preschool reading adventures and activities