I don't have these question cubes out as a center. I use them in Guided Reading groups and during novel studies. The first picture shows a fancy set that are made out of sturdy foam. I borrowed them from my Literacy Facilitator, but since we all share materials I had to give them back--waaa.
I saw on Pinterest that someone made dice out of Kleenex boxes so, I adapted the idea and made the question cubes out them instead! I typed the questions(which are higher order thinking), glued them on index cards, laminated them, and hot glued them to the tissue box. These are cheaper than buying the foam ones and these can easily be replaced if they get crumbled or crushed.