One sea urchin will be on a ledge right before the crab game (get there by taking the series of paths to the up left from just outside the schoolhouse). Collect all 5, then go to the Pulley Emporium and buy a pulley for 5 purple sea urchins. Hidden randomly throughout the map are 5 purple sea urchins. Replace the cork with the Pipe to get the cork. In the area below the schoolhouse is the cork. Then click on the trident to slide it free. Continue moving squares until the hole is above the trident. Click on a square next to the empty black one to move that square into the hole. Click on the ceiling when the mouse changes to an up arrow to move to a slider puzzle. In the stone monument area, to the right of the outside of the schoolhouse, is a statue holding the trident. In the submarine, use the Wrench on the steering wheel to break it loose. Use the Scissors on the helmet to break it loose. Just to the left of the outside of the schoolhouse, heading to the submarine, is a seaweed area with a diver's suit. Since 3 of them are already done for you, 5 of them are randomized in each Walkthrough. This section details how to get every item for the trap to catch the ghost which you need to beat the game.