what do you do about a nibbled heart?

The Princess received a vet set for Christmas. She is currently 'vetting' her huge collection of cats and puppies.

"Oh, no!" she said. "This kitten swallowed a musical amp. It's nibbling at her heart. I don't know what to do."

I suggested perhaps she might ring a surgeon, and she agreed.

"It's fun to play vets, isn't it?" I asked.

She gave me A Look. "I'm not playing!" she said. "I'm a real vet."

Of course. My bad.