I've used some of the ways suggested but when I purchased a length of the headliner fabric it changed my idea of a design wall. I put blocks on the headliner and leave them for a couple of weeks with none of the blocks dropping off. I also have an insulation board wall but have to use pins to hold the blocks. I know the flannel backed tablecloths work well for short term-I've given them to 4-H students to audition their blocks and then roll them up to keep until next session. The tablecloths are very economical but I'm very happy to have spent the money for the headliner--it was about $12 yd when I got mine at Hancock's a few years ago. It is 54" wide and found in the home dec dept.