Tired of being a kid, Timmy wishes he could be older in order to go adult things, but his wish backfires when "Da Rules" states that now that he is an adult, Cosmo and Wanda can't grant him any wishes or turn him back into a kid until he is a kid or acts like a kid./After wishing for a challenging virtual reality game, Timmy goes to the bathroom and leaves it unattended, and Chester and AJ decide to play. Realizing what has happened, Timmy must go into the game and play to save them.