I have a whole big crate of them collected over the years, along with many other home-school resources that may well NEVER get used. BUT, in my mind they are there should someone want to pick them up and have a go, same as the Story of the World book, that is there in case one day someone wants to read it. I don't actually think I'll get rid of the workbooks till all my kids have grown past the ages for them. I reckon if I did someone would then ask for them!!