Disappointed Nana – Buzz Me! Kids Toy Phone Free - All in One children activity center Review

I'be used this app before for myGrandchildren and today it's not letting them use it! What's going on with these toddler apps that you can't get into them or have to buy something else for them to work?
Review by Nana Bud on Buzz Me! Kids Toy Phone Free - All in One children activity center.