Kids love stickers.
I know this from my years of teaching swimming lessons at YMCAs. Let a child pick out a sticker after class and the definition of "simple joy" is personified.
Adults love stickers, too.
I know this because adults have cars and cars have bumpers and back windshields. You can learn and laugh a lot sitting in traffic.
Mean people suck.
SILENT and LISTEN have the same letters ... is that a coincidence?