you know what is fun though? giving someone a piece of PVA film and telling them to wash it with water to clean it.
HAHAHAHHAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA…
oh that’s evil! i love it!
or just spray pva all over something they like bwahahaha. 
spray their car with pva lol
ive always though of spraying pva on someones window and painting over it and seeing what they say when you peel the paint right off.