Six members loyal,
six members true.
We'll stick together,
whatever we do

Mimi and her best friends Yoshi, Tonya, Boris, Hunter, and Sofie have formed the Gum Club, a special club where they eat gumballs from Boris's gumball machine, recite the special Gum Club Promise to always stick together, and talk about important things, like the tunnel they are digging behind the Periwinkle Tower where they might even find dinosaur bones or buried treasure. But it's hard to keep a group of six friends together no matter what. Yoshi has to go to Reading Boot Camp all summer for help learning to read. Tonya is getting annoyed with Yoshi for playing his ukulele too loudly, and she gets bossy while they're digging in the tunnel. Then Mimi says something that hurts Yoshi's feelings and she is having trouble apologizing. Is the Gum Club bubble about to burst?