You get the missing piece to the bell which is in the secret basement in detention. You get into detention by Chewing Gum in the hallway and you get everyone out of the detention room by setting off a stink bomb that's when you make may your way to the secret basement and find the missing piece to the bell. Once they are off the playground you plant the dog treat from where they were standing and the dog will dig a hole and you will find the treasure and the game is over. I hoped this helped.
under the girls at the playground.
Somewhere on playground
at the playground on big Nate island
On Big Nate island the three girls stand on the playground to the right of the school .
Just keep going to your right.
near the playground
Under the playground
under Nate's club and the ladder in the playground where girls are talking in big Nate
Its in the middle of the playhouse area
at the playground
no there isn't
in the middle of the girls on the playground!