Give the edges of the ply panel a sand to smooth them out.
With your newspaper underneath to protect where you're working, use the paintbrush to give the ply panel a wood stain.
After the stain has dried, use a pencil to draw a big heart in the middle of the project panel.
Carefully hammer in nails along the line you've drawn. Try and make them about 2-3cm apart.
Tie the stringline to one of the nails and start criss-crossing it across the panel.
Tie the string on a nail and run it around the outline of the heart.
Make a knot on a nail when you're finished to tie the string off.