Here is an attention-getting Puzzle-Screen

Make a bunch of these and stack them as high and as long as you like. Note that the cross bar is on one side of vertical centre. Looking down, 2 of these (one is upside down) will form an X. Dimensions and shape don't matter as long as the top & bottom notches are in line vertically so your wall goes up straight.

CAUTION: Your brain can hurt trying to figure out this one. If you make the paddles symmetrical, like a vertical rectangle, oval or circle, you'll stack a regular, discernable pattern. If you angle the paddles, as in the above template, each "X" (2 pairs pinned together) will have an up or a down orientation. Paying attention to the orientation, you can stack an orderly, repeating pattern or a totally confusing array, like in the above photos.

Cut a pile of these

and make Room Dividers, Privacy Screens, Feature Walls, Balcony Railings or Fencing Panels or . . . . .

These are some sample patterns that can all be assembled by duplicating only one part. The numbers on top of each pattern are a total parts count of full and shorter pieces. One full piece can make 2 or 3 shorter pieces so you won't need all that many long pieces.

Dozens of sample patterns on one PDF File.