Things You'll Need
Instructions
Take four Zamor Launchers and connect them using four black link pieces. Load a different colored Zamor ball into each launcher and agree on a code with your friends. For example:
Yellow - Safe
Gold - I'm being followed
Silver - A secret message has been left
Black - Enemy approaching
When you need to signal your friends, fire the appropriate colored ball from the launcher.
Give one Bionicle canister to your partner and keep one yourself. Tell your partner to keep the canister with him at all times. Write a message and place it inside the canister. When you meet your partner, put the canister down and make sure he does the same. Pick up your partner's canister. Your partner will pick up your canister and thus receive the secret message.
Another way of writing secret messages is to dip a used matchstick in lemon juice and use it to write the message on paper. When the paper is held near a heat source, such as a 100 W light bulb, the heat will cause the transparent juice to turn brown and reveal the message.
Take the fishing line and measure a length four inches wider than the width of your door. Tie one end around the chest of a Bionicle figure and the other end around the chest of a second. Place one figure on each side of the door and pull them so the line is off the ground. If someone tries to sneak into your room, the figures will make a noise and alert you.