You Will Need:
Child and skin friendly PVA glue (MUST be okay to put on skin!)
Blush powder and a dark eyeshadow
Recipe for home-made fake blood:
Ingredients: Golden Syrup, red food colouring, blue food colouring
The ratio is 1tsp:10 drops:2 drops respectively.
Squirt a line of PVA onto neck and blend out with fingertips. Then draw a line through the centre whilst still wet with a blunt pencil or similar to make the 'cut'
When the glue is nearly dry, prize apart the sides of the cut and roll them away to create the effect shown above. This adds another dimension to the cut.
Apply the blush around the cut and on the glue. Make sure you blend it out well. Then dab a dark eyeshadow (I used brown) inside the cut. Feel your neck and don't add any where there would be bones if cut open, as shown above.
Use a paintbrush to dab on the fake blood. Allow some to drip around the neck and blend around the cut for added effect.
And you're done!
(When you're finished being gruesome just dab away with a wet sponge and it will come off easily.)