Step 2: Materials
4 pieces of wood (pref the same length - if you want a square)
8 large screws
A box of flat head nails
Some twine (a big ball of it)
You'll need the following tools:
Step 3: Build the frame
Screw the screws into the wooden frame at right angles as shown in the diagram.
Step 4: Add the nails
You should aim to space them out fairly evenly (my drawing is no that even).
Step 5: Start tying
Next begin by tying the twine or string to the first nail in the upper left hand corner, next loop it round the upper right hand nail, then to the bottom right nail, then to the lower left nail (you should have a square shape - slightly off centre of the main frame - this is indicated by the red dots).
Next repeat the process but use the next nail to the ones in the original process (represented by the green dots) - but remember you can just continue to loop from one nail to the other rather than cutting the twine and retying. You should aim to only have two "ends" to the twine (basically using one long piece rather than lots of shorter bits).
I looped the twine round the nails a couple of times to give a firm grip.
Repeat until all nails have a loop of twine round them. Now cut the twine and tie it off at the last nail.