I like giving zoomers more cash than the total (like 1.20 for a 0.95 charge) and watching their heads explode. "This is too much" is the usual answer. I'm also getting rich off of incorrect change back.
Haha I just had one announce the total as $26.43. We don't have 1 & 2 ¢ coins here any more (the copper was worth more than the coin) so it's impossible to pay the 3¢ with cash. They couldn't understand why I was laughing. I always manage to offload more coins onto a boomer. I swear millennials don't even count the coins. 😆