Why not make some disgusting beady eyes as your own personal surveillance system!

You will need:
  • Balloons
  • Ping pong ball
  • Paintbrush
  • Pencil
  • Paint
  • PVA glue
  • Scissors
First, you need a ping-pong ball.

Use a pencil to carefully draw a small circle for a pupil.
Draw another circle all the way around the pupil, for the iris.

Try to keep it as circular as you can!
Next, paint the eyeball.

Start with the coloured part, and use a fairly small brush to keep the painting as neat as possible.
Add a little white, flicking the paint outwards from the iris to get a realistic effect.
Now paint the pupil black, but leave a tiny white bit showing through.

This helps the eyeball to look shiny and more realistic.
When it has dried, you'll have a finished eyeball.

What you need now are the veins and nerves.... eww!
To make the veins and nerves, you need a selection of balloons in different colours.
The idea is to very carefully cut some long, thin strips from the balloons.

The strips need to be pointed at the ends.
Do quite a few - making sure that you have a selection of colours.
To catch people out, you need to attach the veins and nerves to the eyeball.

So hold the eyeball between your thumb and first finger, like this...
...and use a brush to paint PVA glue onto the middle part of the eyeball.
Place one of the "veins" into the glue, so that the pointy bit is set just back from the iris.

Repeat the process, going all the way around the eyeball with the different coloured "veins".
When you've finished and the glue has dried, you should have something that looks like this.
You can draw on extra thin veins by using a red permanent pen or marker, like the ones you can see here.

Finish off by varnishing the eyeball with PVA glue to make it nice and shiny.
You can use the eyeball to protect anything you like.

The idea is to pick out a couple of "nerves"...
...and trap them inside whatever you're trying to protect!
If someone opens anything you're trying to protect, they'll dislodge the eye. And because they won't know which coloured nerves you used to set the trap, they won't be able to put it back exactly how you left it - so you'll know if someone's been snooping!
So keep a beady eye on things!

Try it yourself.