I have two young children, one of whom (aged six) loves drawing. Sadly, she often professed to hate Shabbes, given that she cannot draw for the entire day, and I have been looking for a kosher alternative.
One of the things that we have been using is a booklet with pictures that only reveal their colours under water. Using a special applicator, she ‘paints’ the pages with water and the images come to life, but fade back to obscurity as they dry. It’s cute, but it’s not really satisfying her urge to draw.
Are there halakhically permitted products that we can use? Something using light, or iron filings, or sand - with the understanding that it will be for pictures and not for writing. Sources please for the legitimacy of anything; it needs to be 100% kosher for Shabbes.