Order - The order that you find these in does not matter.
Unicorn - Go to where Stamin-Up is located and to the left of it, there will be a large open drawer and at the bottom there will be a unicorn you can collect. Once collected it will turn purple, disappear, and make a sound cue
Monkey - Found in the walkway next to the C-Tower. It will be at the end of the walk way on the other side of the fence, going the direction of the workbench. The monkey will be on the ground and you can collect it and it will then turn purple, disappear, and make a sound cue
Bear - Go to the biolab area. Look for one of the medical stations that has the blue curtains around half of it. It will be on the floor next to the chair and the bench. Once collected it will turn purple, disappear, and make a sound cue
Elephant - In the mining tunnels on the PHD Flopper side not the Speed Cola side. It will be right next to a zombie window in the little opening on the ground. Also next to a small wood pallet. Once collected it will turn purple, disappear, and a make a sound cue.