I bought a little canvas at the local cheap store for $1 and cut out a heart shape from a piece of clear contact paper. I peeled off the backing paper of the heart and centred it in the middle of the canvas making sure it was fully stuck down. Then using different coloured poster paints I just splashed paint all over the canvas, as seen in the picture below.
Once the paint is dry using a toothpick carefully peel off the contact heart and you should have a beautiful little white heart in the middle.
I love this - so quick and simple to make plus so much fun getting all messy with paint.