I think he doesn't like the gift

While this is cool gift, I personally think that if you do not live with them, you should ask before getting something that noisy.

They did this as revenge for the parents being assholes on the show King of Queens.

I really don't think that he should be giving him the middle finger that close to the little girl. Young children are VERY highly impressionable.

Yeah I'd flip you the bird too. What an asshole thing to do....