Two pieces of rope or string similar in size and length.

If using thick rope, longer is better. If using string, shoelace length will do.

This knot can be done with a single piece of rope, but it's easier to learn with two.

The Square Knot is a simple knot for securing non-critical items (think bundle of wood) and is the first step to learning more critical knots, which we'll teach you later.

Assign a piece of rope to each kid or one for you one for them.

Cross the right end (red) over and around the left (black), as if you're tying your shoes.

Over 4,000 years ago, this knot was commonly called the Reef Knot from its use to reef sails by tying them down.

It basically consists of two overhand knots.

You've done the first, so to prep for the next, take the rope now on the right (black) and cross it under the rope on the left (red).

Time for the second overhand knot - a reverse of the first. 

Take the rope on the left (red), and loop it under and over the rope on the right (black).

Pull the rope now on the right (red) all the way through and clean up your knots so they're nice and even.

You're almost done.

You've done the hard part, now tighten it up.

Grab the rope on the left with one hand and the rope on the right with another, and pull them tight to form your knot.

This knot is meant to release easily (think a sailor releasing a sail), so pull as hard as you can.

You've done it!

Knowing how to tie knots could save your family's life.

Have your kids practice with their eyes closed. Time them. Hang rope around the house. Create belts out of cloth so they can practice while rocking a ninja outfit. 

And make sure they now how to UNTIE them too. It's just as important to get out of a knot as it is to tie one.