Jar Craft idea, this is a good idea and so very easy to make.
Halloween Popsicle Stick Catapult STEM Activity for Kids
Halloween popsicle stick STEM activity for easy Halloween science experiments and STEM activities. Candy pumpkin activity with popsicle sticks and rubber bands to explore kids physics activities with a Halloween theme.
Or a mystical/gypsy/witchy vibe - maybe even hire a fortune teller? Every good witch or wizard needs a fine set of apothecary labels for some playful Halloween decorations. Here is a set that will keep your potion making ingredients in order