Another pinner wrote "Like this idea of using a sponge to hold back beads on the warp. Pull the sponge out and slide the beads forward as desired. Need to figure out if I can do this on my rigid heddle loom.maybe without the heddle in place?
Card weaving with a very simple loom: 2 clamps and a pencil, with some weights on the other end. [ooh, such happy high school memories! Card looms are very cool, you can do surprisingly complex things.] That old easel?