Now we're going to Plateau Point. That's the area with the sandstorm. Go over the wooden bridge path and take the Red Ring Challenge. Collect 8 Red Coins to get the chest.
After the Red Ring Challenge, go up to the Red-Blue-Green Cubes Area. This is a timed challenge. Hit the Red Button and go hit the other ones before time runs out to get to the chest.
Now go back where the Plateau Point started. There are two empty grey pedestrals that need to be filled. One is nearby, the other one close to where the blue cannon challenge was. Put them on the pedestrals and push the box onto the yellow square to get the first chest.
After the battles, you end up next to an empty green pedestral. Go back through the battle grounds. The statue for it is next to the battle entrance. Put it on the pedestral to get access to the two chests.
Continue the story path until you get to the big yellow-green-blue puzzle in the center. When entering the area, keep left. The chest is behind the stone wall. The coin gives it away.
Continue the story path. Under the peeing Rabbid, cross the battlegrounds with Challenge 8 and go through the pipe at the end to get to the next chest.
Here's also a blue pedestral that is waiting for a statue. Go through the other pipe (not the one you came from). There's a statue on the other side. Take it to the pedestral to get to the chest.
Continue the path and take the cannon to the icy area. Right at the start there is a Red Ring Challenge to take. Pick up all 8 red coins before time is running out.
Continue to follow the path. Take the cannon and solve the MOVE! riddle to open the door. When you get to the pipe, the chest is blinking down there...