Have you ever tried to make your own playdough?
If you haven’t colored pasta yet, you should prepare very soon. You can create amazing sensory play setups and make amazing art with them. We used colored pasta to create amazing sea animals. It was both art and fine motor exercise.
Have you ever tried to make frozen oobleck? After preparing the oobleck mix, put into the silicone molds and let them stay in the freezer overnight.