Collecting forty crystals in each level unlocks an object in the playroom.

Park 1 - A poster will appear towards the beginning of the Playroom, to the right of the second door.

Town 1 - A fish will appear in the aquarium.

Town 2 - The drawing on the chalkboard will change.

Town 3 - The Puppy will get a bed and food

Park 2 - A poster will appear on the wall to the left of the fourth door

Park 3 - The display on the TV screen will change

School 1 - The toy chest in the Playroom will open

School 2 - A poster will appear over the fourth door

School 3 - The drawing on the easel will change