I've been having tons of fun making art + math mystery pictures on graph paper with clues given in PowerPoint format. Each student gets a printed grid with row letters and column numbers so each square has an "address." It's a precursor to more advanced graphing skills. The PowerPoint is self-running so the clues change every few seconds as the kiddos color in the various squares. Here's a step-by-step graphic which explains it more fully:
This one runs about 7 minutes and is one of the simpler one so it's good to start out with. And it's FREE, so please give it a try at this link. If desired, you can change the timing or turn it off and run it manually.
I've made a couple of these so far and various skills can be highlighted in addition to using number and letter coordinates to locate each square. For example, the L♥VE Mystery Pix below asks students to figure out the area of each color in square units.
|Click to see the LOVE Mystery Pix in my TPT shop.|