A 2d figure with One side, one edge
Make a nice big one out of stiff paper, with a line drawn in pencil down the center of the paper strip on both sides. After you put in the twist and tape it together, cut the Moebius in half, using that pencil line to guide your scissors. You will now have two interlinked rings, neither of which is a Moebius strip. Cut each of these down the middle and you get four interlinked Moebius rings. What happens if you cut all of them down the middle?
Next week's assignment: a Moebius strip in 3 dimensions!