Each group needs:

• clay-based, clumping cat litter
• granulated sugar
• potassium nitrate, such as found in Spectracide Stump Remover available at Lowe's
• wooden dowel, 3/8 in x 9 in (0.95 cm x 22.86 cm)
• strip of Kraft project paper, 2.5 in x 10 in (6.4 cm x 25.4 cm)
• fuse, ~12 cm long ("igniters" for model rockets)
• two 1-cm pieces of a plastic straw
• mortar and pestle (and materials to clean it between uses)
• closed 80- to 100-ml plastic or glass container
• disposable gloves, for students handling the sugar and potassium nitrate
• safety glasses, one pair per student
• We Have Liftoff Worksheet, one per student

To share with the entire class:

• balance(s)
• white glue
• scissors
• rulers
• drill bit (1/8-in or 0.3175-cm diameter) or nail
• ring stand
• skewer or ¼ inch (0.635 cm) dowel with a spike at one end
• water
• (optional) thick gloves and tongs