You can get prizes if you take many photos or make books.
Let's try to get all prizes.
You may see such a panel suddenly.
You can check your prizes in prize list in 'See Zoo book' menu.
Question mark icons show that you have not got the prizes yet.
You can get some prizes according to the number of animals you took photos of.
You can get some prizes ccording to the number of phots.
You can get some prizes according to the number of books you made.
You can get some prizes when you completed special books. For example, books with sounds, animal families ...