This is done in the first location, Goatville. The video will showcase where all three items are located. I however, do not take credit for the video, that belongs to "jestemtostem". Hope this helps!
However, if you prefer text a text guide the items are located:
1: The tree house right behind where you spawn. To get to it jump on the trampoline, and then onto the tree house roof. From there fall below into the tree house room and there will a devil horned statue. Lick it and take it to the location in the upper right and location past the coffee shop. You will see a power line. Follow behind that and there will be a pentagram, drop it there.
2.The second is the house in front of you when you spawn into Goatville. Go into the house, up the stairs and it will be in the room in the upper back left side. It will be on a dresser, lick it and take it back to the same location as the first.
3. Note: to do this as fast as possible enabling the "double jump" in the mutators will be optimal! Lastly, head to the construction site. From there you will see some red containers on the right hand side. Essentially adjacent to the gas station. Jump on them and then once on the roof you will see some fans. Jump on them till you can get onto the container. Once on slowly creep until you fall into the container. You will see a little robot. Lick him and take him back to the pentagram.