Even if you have the jetski key and know where the map is (under the rock on Seal-Saw Island), you still must look through the telecope at the lighthouse, because that's how you are supposed to find out where it is.
(see related question)
Because of the way Big Nate Island is structured, you cannot take shortcuts (even if you know what information is needed). If you are uncertain of the proper order of the solution, see the related question.
its under the rock when you go and take the ski boat
To get under the playground you have to use the crackers to bring the dog over to dig the hole. After this you will find the time capsule and Nate will take the credit.
you cant take the dog. the dog can only help you dig up the time capsule
Catch the old photo blowing in the air by the lighthouse and take it to the Say Cheese photo shop, where the owner will trade you some diving gear. Take it to the water by the lighthouse and dive to recover Cap'n Salty's lost lobster trap. Go across, avoiding the bubbles, then down to reach the trap. Cap'n Salty will give you a lobster and let you use the keys to his jetski.
There is no net on Big Nate island. There is a lobster trap, and you can recover it for Cap'n Salty. Grab the photo blowing around by the lighthouse and take it to the Say Cheese photo shop. The owner will give you some scuba gear to dive for the trap.
Arrange it so that you see words in the middle, that spell out Nate's locker combination. When you have them all inside the frame (from the comics shop), take them back to show the guy there.
you click it and hold down your clicker and then you drag it out and you click the lock type thing and it will open and then Nate and one of his friends will do the rest and then it will automatically take you to in front of the school and the teacher will congratulate you and you will get a medal for completing the island. good luck! i have already passed.
a boat, it is obvious
The Nate Berkus Show - 2010 Nate Wants You to Take Charge was released on: USA: 7 November 2011
This is tricky, but you can't take the time capsule completely out of the hole. Lift it as high as it will go, then press the shiny clasp.
You don't. Give the trap to the old man (Cap'n Salty) and he will give you a lobster and the keys to his jet ski.