-3/16 inch drill bit
-Lego Mini figure head
-Lego Mini figure body
-2 1/8 inch neodymium magnets http://www.amazon.com/gp/offer-listing/B001KUOKPA/ref=dp_olp_new?ie=UTF8&condition=new
Step 2: Head
Shove the first magnet into the head. If it doesn't stay in you can use super glue.
Step 3: Body
Cut off the peg on the guys body. Then drill into the part where the peg was. Now shove the magnet into the body. (WARNING make sure that the two magnets stick together).
Step 4: Done
Done! Now you can use your dummy for all the tests you do!