Castle Island
Go to Darren's house and find the Hospital page in the backyard. Go to the Hospital's mailbox. A patient will give you a ticket to Castle Island. Go to the Ferry Pier to go to Castle Island.
Skateboard
Go left from your house to reach the intersection. Next, go down across the road and keep going in that direction. At the corner, go right. Keep going until the Brickster gives you a skateboard.
Wrenches
From the "man fixing car".
From the radio man.
Go south from the tunnel leading to the south part of the Island. Near the farm at the south part of the Island.
Bricks
For the first one, go to the right. In the cove, there should be a brick. Next, go down into a large "C". Near a treasure chest, there should be a brick. Another brick should be behind the ship. The fourth brick is near a jelly fish. The last brick is near a giant crab. The crab is under the jelly fish. Note: You cannot carry more than one brick. You will drop your brick if touched by a jellyfish, cannonball, chain, shark, or sting ray.