Super Mario 64 - Stars 1-3 in Wet-Dry World Video Walkthrough
Star 1 - Climb the ramp coming out of the water. Then press the exclamation button and climb the stairs. Jump across to the wall, then carefully walk down the ramp to touch the colored cube that will raise the water level. You can then swim to retrieve star 1 in the yellow exclamation box.
Star 2 - Make your way to the top of the course, walking along the plank. Jump to the spinning hexagon shape, then to the ledge with the box holding star 2.
Star 3 - To get star 3, you must find all the secrets in the level. The video demonstrates where to find them all.
Super Mario Video Walkthrough Series for Nintendo 64
