Make cinnamon rolls. My nieces and nephews still talk about the cinnamon rolls they made at aunt Lucinda's. The youngest at the time was dear Adam,who graduated this year, he did the cutting of the rolls with dental floss.
We also did a lot of painting, water colors,and we used food dyes too, but wouldn't suggest this because it doesn't wash out of clothes well.
We dyed cloth with set-a-color dyes. They loved that, and made small quilts for their moms out of their cloth. I really had a blast.