On a wipe board, draw a person with all of the body parts you have taught. Point to a body part and ask them what it is. If they are correct erase that body part. If they are wrong leave it there. Continue with all of the body parts until you have erased the entired person.
The kids will find it amusing when the person is completely gone from the wipe board and they will be very proud of themselves (as they should be!).