(from mandy: i like this idea only if there's a specific room/area for craftycrafts, know what i mean?) I love this art idea. Maybe use the word "Craft" instead of Sew! (I know it's longer, but I do more crafting than anything).
DIY Weekly dry-erase board using a collage frame found at Walmart! Print days of week onto pretty paper, and put a different day into each section (behind glass). Write on glass with dry-erase markers.