New Super Mario Bros. U: Soda Jungle -7 -- Wiggler Stampede

This level has lots of giant Wigglers splashing around in the purple water. They'll help you reach several places and are springy. Time your jumps well for an extra boost. Drop down to the second Wiggler you see for the first Star Coin. You can get the Acorn Mushroom in this level. One of the brick blocks nearby has a vine. The second Star Coin is high above, with other floating coins. There are a few sets of three item blocks. The middle block of each set has a vine so you can reach the Star Coin. Drop down from there to the midpoint. Next is a giant Wiggler running around in the water. There is a P-Switch above it, under the ledge. Hit it to turn the blocks containing the Wiggler into coins so it can move forward. Catch a ride on it and collect some Silver Coins. There's a second P-Switch on the way, which will be surrounded by brick blocks when the first P-Switch runs out. It's not necessary to hit the switch, but it makes things easier, because otherwise, there are several walls of brick blocks. Leave the Wiggler and bounce to the mushrooms. The Wiggler will continue forward, so keep up with it, but it will dive into the water. The third Star Coin is over the purple water. Bounce off the Wiggler to get it and get to safety, as it will dive immediately after that. Keep going to the right, bouncing on the Wiggler when you need to and it will take you to the flag. This opens the path to the castle.