More adventures of TJ Detweiler and his friends Mikey, Gretchen and Spinelli. In 'The Legend of the Big Kid', TJ is kidnapped by a crowd of kindergarten kids after the gang head off to an abandoned playground to try out Mikey's new croquet set. He ends up finger painting and taking a daytime nap, until his friends come to rescue him. In 'Wild Child', the fourth-graders are offered tickets to a water park in exchange for hanging out with the kindergarten kids and passing on some of their wordly wisdom. In 'The Kindergarten Derby', each of the fourth-graders has to choose a kindergarten kid to represent them in the 25th annual kindergarten derby. But can the little kids concentrate for long enough to finish the race - let alone win it? 'All Growed Down' sees Gus telling the story of his wild kindergarten days, with flashbacks recounting how the gang first met and what they were like when they were little.