You can get the seagull to move by using the lighthouse light. Catch the old photo blowing in the wind by the left side of the lighthouse. Swap it for diving gear at the Say Cheese photo shop, and come back to Puffin Point to dive for Cap'n Salty's lost lobster trap. When you return it, you get a lobster, and you can use it to turn the crank on the lighthouse, so that the light scares away the seagull.
(see related question)
The bell is on top of the school in big nate island
Poptropica
by standing by the bell
a unicorn
You ring the bell
Up of the school.
it's on Big Nate Island on top the school
The bell on Big Nate Island on poptropica is located on the top school building. To reach it when you have the clapper, you need to get rid of the seagull there. (see related question)
you ring the bell with the claper you got in the secret room.
Ring the school bell.
In Nate Island, the girls have moved from their spot so you can dig and find the time capsule.
It is in the secret store room behind the filing cabinet in the detention room on Big Nate Island. You need the blue prints from Nate's locker in order to access the secret room.