Tease Monster by Julia Cook (2013)
When One-of-a-Kind”is laughed at by Purple for being weird and Green playfully calls One a klutz after tripping on the stairs, is the Tease Monster to blame? With words of wisdom from Mom about the Tease Monster, One discovers that teasing is part of life. And not all teasing is the same. One learns that laughing at someone (mean teasing)has a hurtful bite, but laughing with someone is alright when it's not done out of spite.