World 9-3

Coin 1

Look for a warp pipe in the gap just past the second arrow sign. It leads to a large room with the Star Coin below, but it's blocked off by several bricks walls. Hit the P-Switch near the top, turning the bricks into coins, then rush to the coin! The fastest route is to head right (jumping the first gap), then keep heading right to the bottom corner, before heading left to the coin.

Coin 2

Another warp pipe can be found in the clouds above, just past the first one (and just before that one's exit pipe). Two coins below mark its location--bounce off the Bullet Bill to reach it. After warping, hit the P-Switch, then run like the dickens across the newly-formed platforms to reach the far coin.

Coin 3

The final coin can be found in the section with the Banzai Bills (the big ones), just past the fifth platform--above this set of four coins. Do yourself a favor and grab a Propeller Hat before attempting this coin, as it'll make your life much easier. Barring that, the best course of action is to bounce off a Banzai Bill from the second platform past the coin (the one that rises) after it's passed by on the left--this is really the only way to ensure the Bill's high enough to enable you to reach the coin.