I have been wanting to try this for awhile (orginally from http://playathomemom3.blogspot.com.) Today we went for it. I punched 100 holes with a screwdriver and Miss.-2yr-old inserted the lights.
Only use for short periods of time and under adult supervision. Remove and put out of reach when adult is not present. Remember bulbs are glass, pointy, and produce heat.
Mr.-1yr-old insisted on destrution. Packaging tape helped keep things intact.