Kid Stuff is the twenty-third episode of T.U.F.F. Puppy's first season.
Snaptrap and the members of D.O.O.M. breaks in a toy store, after letting a truck filled with fortunes pass by, so Snaptrap could steal a tea set. However, Dudley and Kitty comes in the store and they nearly bust them, however, a bunch of kids enter the store too. Dudley tries to shoot D.O.O.M., however, Kitty stops him by telling him about the infamous Rule A-57, the rule where agents can't fight crime in the presence of children. So, they have no other option but to catch Snaptrap and his crooks away from the kids. Unfortunately, Snaptrap hears their speech, so he takes advantage by fooling the kids by telling them Dudley and Kitty have candy, something that Dudley believes too. So, the kids attack the T.U.F.F. Agents while Snaptrap and his friends escape.
Back at D.O.O.M., Snaptrap plans another attack taking advantage from Rule A-57 the next day at 9 A.M. However, Larry tells him there won't be no kids on the streets because the kids' show "Quacky the Duck" is at that hour. So, Ollie suggests Snaptrap to make that attack at the end of the show.
Meanwhile, Dudley, Kitty and Keswick are watching "Quacky the Duck". After it is over, The Chief arrives and tells them about Snaptrap stealing jewelry. However, when Kitty and Dudley arrives, they realize Snaptrap has brought children to the jewelry by performing a puppet show about him killing Dudley and Kitty in a shark tank, and becoming into the king of the world and kicking his mother out from his home. When it's done, Snaptrap fools the kids by telling them that Kitty and Dudley want to force them to eat their vegetables, which causes the kids attacking in rage the T.U.F.F. agents, and D.O.O.M. agents escaping again.
After that, Kitty and Dudley try to bust Snaptrap and his crooks in their layout. However, Snaptrap has invited many children to Larry's birthday at D.O.O.M., which is only a torture festival to Larry. There, Snaptrap defeats Kitty and Dudley with an explosive cake.
Looking for a way to defeat Snaptrap, T.U.F.F. Agents think about the option to ask Quacky the Duck for help, because he's the person more beloved for kids. However, when they try to ask them, Quacky disagrees and takes Dudley out violently.
After this failure, the T.U.F.F. Agents got another idea: dress up Keswick like Quacky, and The Chief like the Sharing Moose, so they can fool the kids and take them away from Snaptrap. They do this at the military base, where Snaptrap tries to steal a missile, and it works. However, Snaptrap activates a missile and they ran way. So, Dudley tries to disarm the missile while singing a song about it from the show of Quacky, and he gets it. Then, they bust D.O.O.M. Agents.