Each student needs:

• Excellent Eruption Worksheet

To share with the entire class:

• 4 cinder blocks or other similarly-shaped object that can support 30 pounds • 1 wooden board, ~2 ft x 2 ft (~.6 x .6 m)
• Drill, to make a hole in the center of the board, just big enough for a garden hose to fit through, 1.1-inch – 1.2-inch (2.8 - 3 cm) diameter
• 4 strips of wood (optional) to place around the edge of the board to create a low box; the strips help to contain the sand during eruption
• Sand, 30-50 lbs (14 -23 kg)
• 1 bag of water balloons (available at toy and party stores)
• 1 water balloon filler attachment for a hose (usually comes in a bag of water balloons or purchased separately)
• 1 metal can with the top and bottom cut off
• 2 lengths of garden hose (anywhere between 4 to 100 feet [1.2 - 30 m] each)
• 1 garden hose valve
• Several small rubber bands
• 1 ruler or tape measure