Dirk and Dorkus were bored, so Dirk said, "Let's go exploring the town," and Dorkus said "Sure."
They walked into a random building even though they didn't know what's inside and it seemed like someone didn't want just anyone to go inside, judging from the lock that they had to pick...
Once inside the building, they decided to sit in a seat and took the thumbtack off of it first. Then the thumbtack started glowing, getting really heavy and sticking to their hands. Eventually, a hole opened up in the floor, and the thumbtack was so heavy, it dragged them down there.
They landed in Prank Haven land. The room they landed in was flooding with candy.
So they ate a bunch of it, and got the power to punch through the wall and get to the next room.
The next room contained a camera, which noticed that they were kids, not teachers, so they escaped Prank Haven land and eventually asked a member of the prankster club "Can we join?" and he answered "Yes." So they joined.