Yoshi's Island 4

Go right and drop down to the floating bit of land to find the first Dragon Coin.

Jump onto the block to the right, then run and jump to collect the second Dragon Coin in the air.

Cross the two floating platforms and enter the blue pipe.

Go right and encounter a Pokey. If you have Yoshi, you can eat it segment by segment. If you are alone, the Pokey will be smaller and can be jumped over.

Continue right, dealing with more Pockeys, until you reach a pipe to exit the area.

Upon exiting, go left and avoid the shell for now. Collect the third Dragon Coin located above a floating platform.

Grab the Koopa shell and throw it upwards at the high block on the left to reveal a P-Switch.

Activate the P-Switch, then hit the block to the right to obtain a Starman (which grants temporary invincibility).

Proceed onto the newly formed blocks. Collect the fourth Dragon Coin as you go and use your invincibility to defeat the Koopas by bowling into them.

Continue right over the floating platforms, watching out for spiky enemies, until you reach the fifth Dragon Coin.

Go right across the last two platforms and enter the green pipe to reach the exit area.