What you need:

An object (a key)

What you need:

A chain (or string)

What you need:

Scissors (if using string)

To make the pendulum:

Cut the string

To make the pendulum:

Fold the string in half

To make the pendulum:

Put it through the key

To make the pendulum:

Pull the ends through the loop made

To make the pendulum:

Tie off the ends!