Super Mario 64 - Stars 1-3 in Tall Tall Mountain Video Walkthrough
Star 1 - Work your way around the mountain till you reach the top.
Star 2 - Get back to the top of the mountain, where there will be a monkey. Catch the monkey, then when the dialog box appears, choose to free him. He will open the cage that the star is in.
Star 3 - Collect 8 red coins along the course, then retrieve the star on the mushroom that's off the mountain.
Super Mario Video Walkthrough Series for N64
