How do you get rid of Ants?

Not just any ants - imaginary ants that only your 2 1/2 year old can see. I spent a very sleepless night battling invisible ants and bees. For some reason Zoe was convinced that the guest bed in my Mom's house had been invaded by ants and that they were all over her. Then she added bees in her pull-up to the equation. We tried several different beds and rooms, but nothing seemed to work. This was the night before our Six Flags trip - she seemed a little warm, but nothing too serious. 2 days later she was diagnosed with an ear infection, I think it ended up being a double ear infection.