Subway

It helps to have a friend or two help to grab the goodies on the lift.

As you ride the lift down, you'll find 6 Objects and 5 Materials, and a Sticker (you may have to replay this section several times to grab them all. Once you reach the first Subway train, ride it to the very next platform, then look for a Sticker Spot below--plant a Yellow Fries sticker there to reveal an Object and Costume.

You'll find an Object after passing through the three wooden wheels. When you reach the lift that you control, look for a secret passage on the left about halfway down--inside you'll find 4 Objects and a sticker. Continue to ride the lift down to the train, then look for an Object early into your ride. After jumping to the train in the background, look for an Object to the left.

Just before the second race, you'll find a Sticker Spot to the left. Plant a Intense Blue Graffiti sticker there to reveal Material and 2 Stickers. During the race, work your way to the top-right corner of the section with a ton of wheels to find an Object, then check out the far right for a Key and Sticker just below.

After raising the car from the sewage, grab the Object in the trunk, then climb the boxes on the right for a Material. As you ride the next lift back up, get ready to collect 6 Stickers along the way. Knock over the box piles at the top to grab 13 Stickers.