World 2-4

Coin 1 (before checkpoint)

Climb onto this platform, near the second ladder, to find three hidden blocks, one of which contains a bean stalk you can climb. Hit both the visible and invisible blocks here to reveal a path and more vines you can climb to the coin.

Coin 2 (after checkpoint)

Try and grab a propeller hat if you're playing by yourself! Now warp down this pipe just after the checkpoint to reach an underground area. Once there, drop onto the coin and then propeller out of there. If you're playing with multiple people, one player can simply leap for it, then bubble-up afterward to escape.

Coin 3 (after checkpoint)

The final coin requires a propeller hat to reach. It's located across from a hill near the end of the level--make a running leap from the base of the hill, then use the propeller hat shortly thereafter to reach the coin. After grabbing it, quickly wall-jump off the nearby wall to hop onto the platform above.