Everyone announces their vegetable first, right?
And then the swatter has to remember and swat the right person/vegetable?

I've run a sort of version of this for kids to help them learn categories. Teachers prepare enough items in a category (vegetables or furniture or containers or musical instruments or whatever) and kids draw from a hat for their assigned item. Typical groups will probably not have difficulty thinking of items in the category, unless there is a very large number of people.

I like that one; the swatting part sounds fun and the vegetables will be silly.