Materials Needed for 6 Kits :
2 cups milk 6 boxes of toothpicks
2 bottles of food coloring – red and green Vinegar
18 small dropper bottles 2 cups water (+ additional water for the serum bottles)
18 small cups (Dixie cup size) 6 small plastic storage containers
6 permanent markers Labels for bottles and containers
1 – Mix 2 cups of milk with 2 cups of water. Add enough red food coloring to get a bright red color and then add a few drop of green to make it a deeper red color so that it looks more like real blood.
2 – Label six dropper bottles to correspond to the three suspects, the victim, the crime scene sample, and the sample from the weapon. You will also want to label each of the six storage containers to correspond to the bottles of fake blood. Fill each bottle with the fake blood mixture. Save the extra “blood” in case a group’s sample gets spilled!
3 – Label six dropper bottles with “Anti-A Serum” labels, label six with “Anti-B Serum” labels, and label another six with “Anti-Rh” labels. Use the information in the chart below to fill the bottles with either vinegar or water. You may want to code the bottles in a way that you can tell the contents easily, but won’t be obvious to the students.
Kit Anti A Anti B Anti-Rh Blood Type
Suspect #1 Vinegar Water Vinegar A+
Suspect #2 Water Vinegar Water B
Suspect#3 Vinegar Vinegar Water AB
Victim Water Water Vinegar O+
Crime Scene Vinegar Water Vinegar A+
Weapon Water Water Vinegar O+
4 – Create the testing kits by placing the correct bottle of fake blood in each kit along with the correct serums, a permanent marker, 3 small cups, and a box of toothpicks in a small plastic storage container.
5 clear cups
blue food coloring
red food coloring