Two things we can gain from our experience is that this additive is neither toxic nor distasteful to hummingbirds. Don't forget to include the appropriate controls. A later project would be identifying the anti-ant substance. And consider how much human food in the world is contaminated and stolen by ants. Behavioral Studies on wild animals such as the seals and sealions on the West Coast, or how clever squirrels are in figuring out backyard mazes to acquire peanuts make very interesting reports.
Insects make outstanding animal subjects - especially for younger students.
Slow moving beetles can be captured and harnessed to pull loads. Plastic petri plates placed next to each other with little openings between them are excellent basic devices for studying insect behavior. Put filter paper on the bottoms of the plates. Somewhere near a colony of ants place little cups containing various concentrations of sugar water. Return in a few hours or the next day to see which cup has the largest crowd of ants visiting it.