Cinnamon is a spice obtained from the inner bark of several trees from the genus Cinnamomum.
It is used in both sweet and savory foods and refers to the mid-brown color that it has.
Cinnamon is principally employed in cookery as a condiment and flavoring material due to the strength of its flavor. (source)
So can hamsters eat cinnamon sticks?
Unfortunately, hamsters can’t eat cinnamon sticks.
Cinnamon sticks are not a good food for hamsters to eat due to the nature of their taste which is very bitter if it is eaten straight.
There are much better foods for them to eat.