I use this lab in my Pre-AP high school class for scientific method, but it can be used for all level. The ink in Papermate pens has the same chemical pheromones as termites. The question for the students is to discover which pen the termites will follow. It is amazing how the termites will follow the shape of the one ink and not the others. I take this time to test about behavior and insects. Great lesson. I presented it at Keystone Institute in Silverthorne, CO.