Chicken is a really good medium to try spices (or something like tofu if you are vegetarian)

Everyone kind of has a good idea of what chicken (or tofu) tastes like on its own and then you have two options:

1) Dry rub with different spice blends
2) Make different sauces with different spice blends

Another option would be create some little dishes of olive oil + baguette. The baguette plus olive oil on its own is your baseline and then add in the different spices and you should taste the differences