Each group needs:

• 3 solid halves and 3 crushed halves of antacid tablets, such as Alka-Seltzer™; do NOT use Tums™ tablets
• 1 clear plastic cup
• 1 stopwatch or clock with a second hand
• vinegar, enough to fill the clear plastic cup
• Fuel Analysis Worksheet, one per student; choose from two versions: for grades 2-3, for grades 4-5
• safety glasses/goggles, one pair per student

To share with the entire class:

• access to a sink to get and dispose of tap water

For a class demonstration:

• 1 tablespoon baking soda
• ¼ cup vinegar
• 1 clear cup or bowl