Thanks bkay. I have thought of this and understand your post. Will do this as I experimented with glues and had no success. I diluted the Elmers washable glue with 4 parts water and 1 part glue, used a very fine tip and minimum amount and it still was difficult to wash out. Friend said she soaks hers in the washer overnight in hot water, then runs it through on heavy duty washing. I am afraid my blocks are too old and fragile for that!