Super Scientist Lincoln showed us how to do a candy geyser explosion. He brought in a two liter of diet coke, mentos candy, and the Geyser test tube. He placed the mentos in the Geyser test tube and set it on the top of the coke. He pulled a string that caused the candy to go into the coke. This caused a 5ft geyser. The candy causes the soda to release all its bubbles at once and a chemical reaction occurs. The students loved this experiment!