If it can fit in your mouth, there's a high chance it's edible. That's the Tsum philosophy.
Deuce's tsum snuck into the Heartslabyul kitchen to eat 12 dozen eggs that were still in the carton. And because Tsums can change their size, it did grow as big as a barge.
Leona's tsum nibbles on grass no matter how much its larger counterpart snaps that it shouldn't be acting like an herbivore. It also keeps trying to push said grass towards Idia's tsum who bolts every time it sees leafy greens to go munch on Leona locks.
Floyd's tsum is the worst about this. It ate the homework of five different Octavinelle students (which Trein refused to accept as an excuse) and chugged an entire jar of shoe polish. Meanwhile, Jamil thought Azul's tsum wasn't leaving him alone because it wanted to get at his shiny hair ornaments when really it just wanted to nibble the hair said ornaments were attached to.
Epel's tsum tries to tuck in to anything that has an apple on it. The poor thing nearly choked on an apple-shaped paperweight.
Sebek screamed his tsum hoarse when he saw it chewing a literal hole in the walls of Diasomnia. The STONE walls of Diasomnia. The tsum had to be bribed with an entire salmon to get it to change course.