Hit them they light up....
3 Volt red LED and 2 x 1.5 v button cells.
Step 1: Battery Bit
Drill a 1/4 inch hole 1/4 deep and a small10th inch downward hole into the 1/4 inch hole.
Use a 1 1/2" x 3/4" baton, about 1 foot long.
Push one leg of the LED down the small hole.
Push the batteries into the 1/4 hole, and suspend the other leg over the front of the batteries.