See how each birds housing effects their personality and behavior?

You could compare the behavior differences if one is fed organic and one processed food

You could do...

Which one can learn tricks/words faster. Learning with music or no music.

I'm doing an independent study at school on animal behavior. The animals my teacher is giving me are 2 cockatiel birds. I really need help thinking of an idea on what to do with the birds to find a behavioral change without harming the birds. Please help me with ideas other than change in diet. I have 10 days to think of a plan. I do not know the genders of the two birds

Thank you!