Shy Guys guard this prairie town. Pull the nearby handle to raise the platform, then get the first gem under it. Climb up the ladder and you'll find a few Shy Guys turning around. If they see you'll, they'll chase you, so try to avoid them. Climb up the ladder and you'll find some turnips you can throw at them. Pull the handle to raise some more platforms and drop through the hole. You'll land in an area with a fan. Step on the fan and cross it to reach the doorway in the wall next to it. Go through it to reach Blue Toad with a 1-up. Blow on the fan to reach a handle and pull it to raise the doorway. Go through it while blowing on the fan to go through the doorway. You'll see a ladder near two handles. The handle not in front of the ladder makes a Shy Guy and some coins appear. From the handle, you can reach the second gem using the fan. The other handle makes an opening appear under the ladder that leads down to the third gem. Once you get the third gem, return to the surface and use the fan to reach a short set of stairs. Pull the handle near the cactus to raise more platforms, then climb the ladders to reach the Star.
Special Challenge: Collect the 1-up Mushroom.