You have to find the bell clapper by getting detention and by going in the file cabinet. Put the clapper in the bell and it will ring bringing the girls from the playground.
under the girls at the playground.
Somewhere on playground
Its in the middle of the playhouse area
under Nate's club and the ladder in the playground where girls are talking in big Nate
On the playground.
big Nate's tree house is at the playground area
at the playground on big Nate island
the capsule is under where the girls at the playground were standing use the crackers to make the dog dig in that place
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