Splattering blood- option 1

You will need:

Soy sauce
Red food coloring
Plastic tubing, to fit
Plastic syringe
Push pin

How to:

1) Make the splatter gun. Take a piece of small plastic tubing about the size of a vein or an artery, and force it onto the end of a syringe. Use tape or glue to make this into an airtight seal.

2) Make the blood. Pour some soy sauce into a cup or bowl and add the red food dye. Add enough to make the blood dark red.

3) Load the syringe. Put the end of the tubing in the cup or bowl and pull back the plunge to suck up the blood.

4) Stop the end. Use a push pin to clog the end of the tube. Make sure it's well clogged.

5) Prep yourself. Tape the loaded syringe under your costume and push on the plunger to release a spray of blood.

Found off: http://www.wikihow.com/Make-Fake-Blood