nikolai's+and+Wen+Jiang's+materials

 Materials:  One model rocket, two engines, storage box, paper clips, three 5 cm wood sticks, bungee cord, utility knife, glue, scissors, paint, sandpaper, a copy of the student book information sheets, penny holders, 15cm rocket tubes with 2cm diameter, three helicopter rotors, three springs, large foam board, 10cm long toilet paper roll with 5 cm diameter.