The lighthouse light can be cranked around using (oddly enough) a lobster. Get a lobster by diving for Cap'n Salty's lost lobster trap. You can get Scuba gear by catching the old photo on the left of the lighthouse, and taking it to the photo shop.
The main light on BIG NATE island is the LIGHT HOUSE
it is at the right end of Big Nate Island
you use it to turn the light on the lighthouse
Use the lobster as a crank to turn the light. (see related question)
The missing bell clapper is hanging from the ceiling.
On Big Nate Island, you use a lobster (no kidding) to turn the lighthouse crank. (see the related question below)
You have to find the switch, which is down near your feet, and push it.
Use a lobster to grip the crank on the lighthouse light. (see related question)
There is a lighthouse on Big Nate and Vampire Curse Island.
on top of the lighthouse
To get the seagull away, you have to turn the lighthouse light. Use the lobster.