Go ahead and get suit upgrades. Robin will need his magnet one to cross over, or Batman his glider one. Either way, get over and kill some crocs and destroy until some dual pressure pads are revealed. The dual pressure pads need to be activated so that Batman can cross a bridge and get his demolition suit back. He needs it to cross back over and destroy the cover of the only exit.

In this next area, you’ll have to cross some toxic waste to get to the next canister, but you won’t be able to get it now.

This next area involves going down a slide. You will then need to wreck some stuff there to make some gears on both sides. Target the two flashing areas on the opposite wall with batarangs, and then the room will fill up with water. Swim over and build a lever. Pull it, and the slides will become stairs.

Get to the top of the stairs, and you will have some cans to destroy, which can be built to create a toilet. Yeah, I know. There is a gate that you can destroy which will give out some serious studs, including the purple.

Another canister is here, but can’t get to it. You’ll need high jumper, but you won’t be able to get it until Free Play.

You can go up the stairs, and blow up the gate here. You can actually build a mechanical croc that, when his back is jumped on, will cause him to vomit lots of studs. I don’t even know if there is a limit you can hit with this.

Go ahead and assemble the lever there, and some metal tiles will come down. Swim over to where they are and assemble them on the wall. Have Magnet Robin walk up them, and let him claim his Water suit.

There is a canister that is out of reach. Go ahead and ignore it for now.

He can then dive in below, and pull a lever. Water will flood in on the room on the opposite side, and he can get it. He can dive in and get the First Canister as well.

Weird machine here with fan blade that you won’t be able to access until you get to the Free Play area.

Go ahead and climb the ladder until you get to Killer Croc. He’s actually pretty easy to defeat. Just hit him. He will go into a corner and fling shopping carts, but if you stay over, you can just ignore them. Keep hitting him until he falls.