Chapter 3. In the starting candy machine.
Anchovy:

on the machine on the right and pick up an
anchovy on a stick. Select it in your inventory and interact with it to eat it. You get a
stick.
Cotton Candy: The machine in the middle,

the green thing just to the left of it to plug it in. Use the
stick with the cotton candy dispenser to get
plain cotton candy. Select it in your inventory and interact with it to eat it. You get your stick back. Use the lever on the left of the machine to change it to
Calzone flavoured. Repeat stick and eat. Then hit the lever one more time to switch to
Phosphorus flavour. Repeat stick and eat.
Chewing Gum: The machine on the left by the door.

to get
chewing gum. Select it in your inventory and interact with it to eat it.