Here, are a few steps to make a small rocket that may boost up to 5 metres-
Step 1 - Take a toilet roll cardboard and cut slits at the bottom so that you can fan out the bottom.
Step 2 - Tape the toilet roll to the centre of a paper plate.
Step 3 - Fill a film canister with about ten ml of water.
Step 4 - Drop an Alka Seltzer in, close the cap so it clicks.
Step 5 - Drop the canister into the toilet paper roll, so the cap is facing the plate.
Step 6 - Wait for the canister to take a flight.
Its a easy method to make. All the things will be available easily.