Before seeing this, I would have said kids. Now, I'm not so sure. Some of these are pure gold:
http://www.photobasement.com/41-hilarious-science-fair-experiments/
I love the one titled "Crystal Meth: Friend or Foe"
http://www.photobasement.com/41-hilarious-science-fair-experiments/
I love the one titled "Crystal Meth: Friend or Foe"