There is an old song which comes to mind
Shut the doors, they're comin' in the windows.This is hangin' out from the Australian Museum on College Street opposite Hyde Park South, advertising their Dinosaur Sleepover on 2nd September.
Shut the windows, they're comin' in the doors!
Fred Ebb & Paul Klein, mid '50s
No kids without adults; no adults without kids. No more than 4 kids per adult. Bring yer own air bed and sleeping bag. And wheelbarrow filled with money!