World 7-1

Coin 1 (before checkpoint)

To reach this first Star Coin, run up the purple block when the right side is tilted at its highest point, then wall-jump off the pipe to the coin.

Coin 2 (after checkpoint)

Head down the first yellow pipe after the checkpoint then cross over the platforms to find the second Star Coin just past the exit pipe. You'll notice a green platform that rises and falls in two alternating spots beneath the coin--jump to it when it's on the left, then leap for the coin as it recedes and try to land on it as it rises up on the right.

Coin 3 (after checkpoint)

The final Star Coin is located just before the level's exit pipe. To reach it, ride the purple platform below it and leap from it just before it reaches its apex to nab the coin, then try and land on the yellow block below.