The location where items appear is randomly refreshed, and it’s different when I enter it the second time.

Take the fishing rod to the back of the tree house for fishing, and then go to the observation deck behind the lumberyard to feed the cat. You can get binoculars at the observation deck.

Take the gasoline barrel to the lumberyard, drill into the wooden path (break it with bricks), pour it into the generator, you can cut wood on the opposite side of the generator, go out and turn on the switch (there is a key on the table outside)

Go to the tree house and get off your bicycle. There is a wooden house next to it. The window on the left is broken. Throw a brick from there and smash the door. You can open the door (aiming, I tried three times), but there is only one achievement inside.

The remote control (I found it once on a square mound at school), then go to the farm, squat down at the sign, and drive out the remote control car (I didn't expect this to be the hardest for my handicapped person)