October is the perfect month for spooky Halloween science experiments and projects. Here’s a collection of projects to make gooey slime, glow in the dark items, and creepy pumpkins.
Halloween Science Experiments
Ectoplasm Slime – Whether or not you believe spirits generate ectoplasm (ala Slimer in the movie Ghostbusters), slime is a nice addition to a Halloween party or costume. Making slime is a practical exercise in polymer science. Experiment with ingredient proportions to modify the properties of the polymer.
Frankenworms – Turn gummy worms into Frankenworms using the reaction between baking soda and vinegar.
Glowing Water – Make glow water for decorations or to make creepy glowing drinks.
Glowing Slime – Build upon a basic slime recipe by adding an ingredient that either makes the slime glow under a black light or else makes it glow in total darkness using phosphorescence.
Glow in the Dark Blood – There are several ways to make realistic fake blood for Halloween decorations or to use as part of a costume. One safe recipe is to combine corn syrup with non-toxic school glue. Making it glow depends on the additional ingredient you add.
Glowing Face or Body Paint – Around Halloween, you can buy glowing make-up, face paint, and body paint. However, it’s easy to make it yourself, plus you have total control over the ingredients and colors.
Glow in the Dark Nail Polish – Similarly, it’s easy to make nail polish glow in the dark. Apply glowing polish to nails or to other surfaces as a waterproof coating.
Bleeding Paper – This special paper “bleeds” because of an acid-base reaction. Creepy, but cool.
Hand of Doom Punch – Serve this Halloween punch at your holiday bash. A disposable glove is used to make the hand, which can be coated with fake blood. The punch glows under a black light and can be made into a bubbling, smoking potion by adding dry ice.
Glowing Hands – Leave glowing hand prints or just make your hands glow. All you need is a common household chemical.
LED Glowies and Throwies – It’s easy to make anything glow using an LED and a coin battery.
Science Halloween Jack o’ Lanterns
Safe Self-Carving Pumpkin – The self-carving pumpkin chemistry demonstration is spectacular, but slightly risky (BOOM!). Fortunately, there’s a safe method kids can use to push carved bits from a jack o’ lantern. It’s still a chemical reaction, but there’s less pressure and no risk of a fire.
Smoke Bomb Jack o’ Lantern – Smoke and purple sparks and flames erupt from a carved pumpkin.
Flamethrower Pumpkin – Turning a carved pumpkin into a colorful flamethrower might not make you particularly popular with your HOA, but it’s an exciting way to experience the effect heating metal ions has on flame color. If you live (as I do) where fire ants are a problem, you can light the pumpkin over the mound. The boric acid that makes the green color is a natural insecticide.
Red Flames Jack o’ Lantern – Is red your color? Use chemistry to make your carved pumpkin appear extra-hellish.
Fire-Breathing Dragon Pumpkin – This carved jack o’ lantern combines a dragon face with various chemistry techniques to make the pumpkin “breathe” smoke and fire.
More Halloween Science
Halloween Periodic Table – If you’re performing scientific calculations that require atomic weights or knowledge of the elements, use the Halloween periodic table. It’s seasonal and factually accurate.
Homemade Mad Scientist Costume – Dress up while performing Halloween science experiments or be a mad scientist for a party. You probably don’t need anything to make this costume that you don’t already have in your closet!
Smoke Machines and Pets (or Kids) – If you’re using a smoke machine for a spooky vibe, be sure you understand the risk they can pose to children and pets. Learn how to use smoke or fog safely.