# 25 Demonstrations Under \$25

Looking for inexpensive demonstrations to incorporate into your classroom or home? We recognize not everyone has all the materials or funds to repeat all our demonstrations.

In order to make this easier for you, here are 25 demonstrations you can recreate for under \$25 each. From learning how to skewer a balloon without popping it to learning about blood types, your students will learn about a variety of STEM areas in hands-on demonstrations using supplies that are likely already in your cabinet!

Read our demonstrations individually below, or watch our full playlist on YouTube. Be careful, though—try these at your own risk.

## Featured Demonstrations

Watch Surface Tension Trap video

## Surface Tension Trap

Demo: 1 minute
Why do pool toys never stay in the pool's center? Hint: it has to do with surface tension!

Watch Oobleck video

## Oobleck

Demo: 5 minutes
Play with a creation that has solid matter properties, but is always a liquid!

Watch Fireproof Balloon video

## Fireproof Balloon

Demo: 1-3 minutes
Is it possible to save a balloon from popping when fire is touching it?

Watch Floating and Sinking Eggs video

## Floating and Sinking Eggs

Demo: 1-2 minutes
Use the properties of density to both float and sink an egg!

Watch Skewer through a Balloon video

## Skewer through a Balloon

Demo: 2-5 minutes
Stick a skewer through a balloon without popping it!

Watch Glove Filled with CO2 video

## Glove Filled with CO2

Demo: 3-5 minutes
Blow up a balloon or glove using a chemical reaction that creates CO2!

More demonstrations to try at home or in the classroom!

Watch Anti-Gravity Bottle video

## Anti-Gravity Bottle

Demo: 30 seconds
Use a ping pong ball to trap water in a bottle, even when it is turned upside down!

Watch Buoyancy Bottle video

## Buoyancy Bottle

Demo: 3-5 minutes
What sinks, and what floats? Figure out how the amount of sugar affects buoyancy!

Watch Kruskal's Card Game video

## Kruskal's Card Game

Demo: 3-5 minutes
Can you find you way to the end of the path? Play to find out while studying probability!

Watch Nail Puzzle video

## Nail Puzzle

Demo: 3-10 minutes
How many nails can you balance on a single nail head?

Watch Let's Communicate video

## Let's Communicate

Demo: 5 minutes
Think like an engineer and work on giving clear directions on how to build your creation!

Watch Boxing Beans video

## Boxing Beans

Demo: 3 minutes
Can different shaped and sized containers hold the same amount of material?

Watch Bernoulli Balloons video

## Bernoulli Balloons

Use air pressure changes to move balloons and predict how they will move!

Watch Milk Trick video

## Milk Trick

Get your groove on with this science demo creating a constantly changing kaleidoscope of colors!

Watch Burning Money video

## Burning Money

"Burn" a dollar bill without charring any of the dollar bill itself!

Watch Baking Soda Bubbles video

## Baking Soda Bubbles

Explore the meaning behind density with bubbles!

What happens when an object doesn't float or sink? It flinks! Construct a device that uses neutral buoyancy.

Watch Boats Afloat video

## Boats Afloat

Use your engineering skills to create a boat to hold the most weight!

Watch Marker Chromatography video

## Marker Chromatography

See what colors make up other colors while creating pieces of art!

Watch Giant Bubbles video

## Giant Bubbles

Mind Trekkers' own recipe for the perfect giant bubble. This solution, plus a small pool, hula-hoop, and a landscaper's brick can put you inside a giant bubble!

Watch Cloud in a Bottle video

## Cloud in a Bottle

Why are there clouds in the sky? Learn how pressure affects how clear the skies are!

Watch Fingerprint Balloon video

## Fingerprint Balloon

See just how unique your own fingerprints are!

Watch Invisible Fire Extinguisher video

## Invisible Fire Extinguisher

Learn to put out a flame with the tip of a cup!

Watch Are You My Type? video

## Are You My Type?

Have you ever wondered what blood is made of? Learn what types of blood can be donated!

Watch Color Subtraction Challenge video

## Color Subtraction Challenge

Try picking colored poof balls once every color, except red, is removed!