You will need:

• dirt
• flour
• liquid soap
• play dough
• red food coloring
• vinegar
• baking soda
• bottle

You need to do:

1. Take the bottle and put some baking soda in it.
2. Put in some soap, food coloring and flour.
3. Put play dough around (not in) the bottle.
4. Get the camera ready.
5. Put the vinegar in the bottle!

I did this at my friend's birthday party, and I've done it before without the soap, food coloring and flour.