Wait until they take the balloon out to the skyscraper — and find the width of the balloon keeps them from getting close enough to the building to reach the windows.
Hard to believe she’d tell her kid to “get lost.” Aside from being rude, it’s just asking for Elizabeth to start bawling her head off — as well as to teach Elizabet to tell Elly to “get lost” at some time in the near future.
Probably more interesting than most “small talk.”