You can see the map with the telescope from the lighthouse (far right). But you will need to race Nate out to the seal rock. Jump over the seals and push them both to the left side of the seesaw rock. It will tilt that way and you can remove the map. It shows the location of the Time Capsule in the playground.
(see related questions)
you use the seals to weigh it out to one side
Push both seals to the very left of the rock.
its under the rock when you go and take the ski boat
Look through the telescope on top of the lighthouse to see where you are going : the seal rock has a map under it. Race Nate to the island to get the map.
Push both of the seals on the rock to the left and collect the peice of paper under the rock. Then ride back to the island.
On 24 Carrot Island, the vent diagram is in a window near the roof. On Big Nate Island, the school blueprint is in Nate's locker. The secret map to the Time Capsule is under a rock on Seal-Saw Island.
the middle part look on map u got from seal rock
You have to move the seal that is on the right all the way to the left and just click on it
Tilt the rock by moving the seals to the left side. You can now retrieve the paper, which is a map to the Time Capsule on Big Nate island.
A surprise..................... A Crab
Under the playground
Move the seals at the left side and go under the rock