I arranged the little bowls around the paper and made sure everything was in reach. I also gave him a wet cloth to wipe the glue off his hands and left him to it.
Setting up crafts and making them comfortable has become a big priority here: as low stress as possible for both of us. Having a wet cloth next to his work was really helpful. He didn't need to stop to ask for help from me or become frustrated. He knew what to do when his hands became uncomfortably sticky. The other thing I found helpful was only giving him items that could be easily vaccuumed or picked up. If we were in the backyard, turmeric or cinnamon would have been really fun to use, but we used lentils, pasta, bay leaves, rice, pumpkin seeds and other things that are easy to clean up.
Please let us know if you have any good tips for keeping your craft times relaxed and autonomous, we'd love to hear them.