At the end of our V week I let Cole make his own mini volcano. We started with a baby food jar and added playdoh around the sides to make it look like a volcano. Mix together some baking soda with red sprinkles (this makes the lava red). Add 1 tablespoon of baking soda to the jar and then poor 1/4 cup of vinegar into it. Watch it erupt. I actually took some video of the eruption that I'll share next. Cole absolutely loved this and begged me to do it over and over again.