Step 1: You will need :-
A container that 35mm film comes in or similar size container.
Red and yellow food coloring (optional)
Liquid dish washing soap
Step 2: Procedure:-
Put the container into the volcano at the top
Add two spoonfuls of baking soda
Add about a spoonful of dish soap
Add about 5 drops each of the red and yellow food coloring
Now for the eruption!:
Add about an ounce of the vinegar into the container and watch what your volcano come alive.