Inequality?

My little sister was blown away by the inequality evidenced in this picture.  While Kincaid often lets Duke sit with him in the big chair, more often than not Duke has to sit in the cushee (the booster seat for the dinner table).  He doesn't mind it at all that his big brother has the comfy, Lazy-boy.  I am looking for a small chair that he can use for his show in the evening in case he begins to feel that his brother is getting preferential treatment!!