Whenever we'd eat out when I was a child, and I'd hear of waiters or waitresses "waiting tables", I thought it was "weighting tables" instead. I couldnt figure out any connection between "waiting" tables and "waiting" as in patiently waiting for something, so I thought waiting tables must be "weighting" instead. I could figure out a connection there, since after all, putting food on tables DOES add weight to the tables.
A childhood belief about excursions

others believed things like this
- When I was younger, I believed that times tables in maths were kids sitting at tables staring at clocks!Anon
- when i first started school i thought the teachers lived in the school and slept on the tables.— emma
- When I was little I was afraid of vacum cleaners. I thought there was an old guy inside waiting to eat you.— Kittenz r kool
- I always thought that a little person lived inside each mailbox waiting to take my letter to its destination.— Anne
- I used to think that the toast would never pop out of the toaster if you watched it while you were waiting.Anon
- I used to believe that my head was filled with hair waiting to grow.— Poppy