Levels 31-40
Level 31: Hubcap

At the start of the level, don’t change your camera orientation just yet. It makes it easier to give you directions.
Go to the street and hitch a ride on a car that’s headed to the right. When you reach the circle drive, bail out and find a second car or truck that’s going to the lower right, towards the long hedge in the middle of the road. The hubcap is next to that hedge (above).
Level 32: Ball

As you make your way down the street, keep an eye on the canal for a row of three pillars. The ball is floating in the water next to one of them. The trick is that the stage’s design is encouraging you to stay on the far side of the street so you can’t spot the collectible.
Level 33: Picnic Basket

In the playground, use one of the spring-loaded rocking horses to fire yourself into the far corner of the yard, next to the two kids who’re playing by themselves. The picnic basket is next to them, under the bench.
Level 33: Tricycle

When you reach the bus stop at the end of the level, skirt around the bus and go down to the end of the street. The tricycle is behind the junction box next to the row of bike racks.
Level 34: Wheel

In the gas station’s parking lot, look for the gap in the back corner of the fence and go through it. The wheel’s barely hidden in the tree’s shadow.
Level 34: Jerrycan

On your way out of the level, take time to check the trash area behind the gas station. The jerrycan’s back here next to one of the dumpsters (above, left).
Level 35: Highway Sign

If you’re alert, you’ll see this during the introductory sequence. The highway sign is in the shadow of a streetlight just above your starting position. It can be a little tricky to reach, but at this point in the game, you should be used to playing Frogger with oncoming traffic.
Level 36: Egg

This level’s all about riding bird shadows. After your first bird taxi, you’ll end up in a corner of the farmyard with a trio of birds who’re constantly flying in a circle. You have to time it very well, but you can jump from one of those birds to another one who’s in orbit above the egg (above, circled in red).
It’s easy to spot, but it’s also easy to mistake as set decoration, and you pretty much have to make a suicide dive for it.
Level 37: Pitchfork

In the back yard, once you’ve used the clothesline to launch yourself over the fence, look for this in the shadow of the nearby tree. It’s behind the two deck chairs.
Level 37: Kite

When you get around the row of houses to the front, you’ll see a cutscene where your human rides away on a bike. At this point, continue circling the houses until you reach the copse of trees with a schim jumping around in their shadow. If you rotate the camera, you’ll spot a kite’s stuck in one of them. Shake it out of the tree to grab it.
Level 38: Lifebuoy

You begin this level out in the water, and must navigate through a few parasailers, pigeons, and uh, pswimmers to get back to dry land. When you do, go down the row of pilings and break left once they end. If you use the parasols to fire yourself a little further up the beach, you’ll eventually find an out-of-the-way lifeguard tower with a truck parked outside it. The lifebuoy is next to it, in the corner of its shadow.
Level 38: Treasure

Next to the aforementioned row of pilings, there are two kids flying kites. When you jump into a kite’s shadow, you can pilot it a short distance like you could with the shipping drones in level 14. Use one of the kites to drop yourself off nearby, in the shadow of the guy with the metal detector (above).

If you press the interaction button while you’re in the metal detector guy’s shadow, he’ll dig up a treasure chest, which you will automatically collect.
Level 40: Parasol

When you reach the sidewalk next to the parking lot, circle around it until you find the dumpsters. The parasol is behind them. It’s more obvious if you switch the camera angle to put the dumpsters in the foreground.