

Please help
Hi everyone!! I found this frankie doll at the charity shop yesterday for only £4! i used to collect monster high years ago but when i was 15 i had to give them all away :( i saw it yesterday and thought why not. I never had this doll but i remember my friend did and when you press the tummy it lights up. Does anyone know how to fix it so it would work? Or the type of batteries needed?
Thankyou in advance 🙂💓