Don't waste your time or money. You will be told to MYOB & sent away. How dare you want to do something nice.
I really don't think that is fair. Almost no one has not said that they would be rude in accepting or refusing - regardless of whether or not they were annoyed - and several people said they would be gracious - and almost no one has said they are actually offended. If anything, this thread should be an example of what you think is a generous gesture, and what you perceive to be received as a generous gesture, is sometimes received with mixed feelings on the other end.
I think if someone chose to do this, they would find that their gesture was accepted and go about the day believing they had brought delight to a family. And perhaps they did. And perhaps they inadvertently caused the "my balloon popped" meltdown. Or the "we can't go on rides because you won't let go of the balloon" day. Or the "we have to leave my favoritest balloon ever behind" tantrum at the airport.