This is a playable sculpture. The base is cement and the bricks have been painted and given a top coat. But, they are not glued. I envision these as potential energy pieces in that you can decide if they are changeable and how much. Keep it on your desk for when you need a break, or on your shelf with your favorite order or the one I made for you. We never outgrow tactility or wanting moments of autonomy where we get to make choices and decisions for no reason other than they please us.