Grandparents bought a Christmas gift already that I don’t like 😬😬😬

What would you do? He asked for a watch for this Christmas and they’ve gone and bought him a $5 watch without running it by me. This is his main Christmas present that he’s requested So I wanted one a bit better than a $5 one!!! Now I’m unsure what to do. They’re giving it him for Christmas. I’d happily pay for another one but don’t want to upstage them now. Argh.