Engaging Science Experiments for Curious Young Minds

by | Oct 30, 2025 | Early Education

Explore Density with a DIY Rainbow Jar

A rainbow jar is a mesmerizing way to teach kids about density and liquid layers. Gather liquids like honey, dish soap, water, and rubbing alcohol, and color them with food dye. Layer them carefully in a jar, and watch as a vibrant rainbow forms before your eyes.

Steps to Create a DIY Rainbow Jar:

  1. Collect four liquids: honey, dish soap, water, and rubbing alcohol. Use food coloring to color each liquid a different shade.
  2. Slowly pour honey into the bottom of a tall, clear jar.
  3. Add the dish soap on top of the honey, pouring it gently to avoid mixing.
  4. Carefully pour the colored water over the dish soap using the back of a spoon to slow the flow.
  5. Finish with the rubbing alcohol as the top layer, again pouring over a spoon.

This experiment demonstrates how different liquids have unique densities and provides an opportunity to discuss why some liquids float while others sink. Did you know that the Dead Sea, one of the saltiest bodies of water on Earth, has such high density that people can float effortlessly on its surface?

Make Homemade Slime

Slime-making is an all-time favorite activity for kids. Combine glue, water, and borax (or contact lens solution) to create stretchy, gooey slime. You can even add glitter or beads for a personalized touch. As children play with the slime, they’re learning about polymers and the science of elasticity.

Steps to Make Homemade Slime:

  1. In a bowl, mix 1/2 cup of white school glue with 1/2 cup of water.
  2. Add a few drops of food coloring and any glitter or beads for customization.
  3. In a separate bowl, dissolve 1 teaspoon of borax in 1 cup of warm water.
  4. Slowly add the borax solution to the glue mixture while stirring until the slime begins to form.
  5. Knead the slime with your hands until it reaches the desired consistency.

Polymers are everywhere in our daily lives—from the plastic used to make toys to the rubber in car tires. Teaching children about this versatile material through slime helps them connect science to the world around them.

For added inspiration, check out the Sime Time in Deptford Mall, where interactive exhibits delve into chemistry and hands-on fun.

Solar-Powered S’mores

Take advantage of Chandler’s sunny weather with this eco-friendly experiment. Build a solar oven using a cardboard box, aluminum foil, plastic wrap, and black construction paper. Place marshmallows, chocolate, and graham crackers inside, and let the sun’s energy work its magic to create delicious s’mores.

Steps to Make a Solar Oven:

  1. Line the inside of a cardboard box with aluminum foil, shiny side up, to reflect sunlight.
  2. Place black construction paper on the bottom of the box to absorb heat.
  3. Cover the opening of the box with clear plastic wrap, securing it tightly to trap heat inside.
  4. Arrange marshmallows, chocolate, and graham crackers on a small plate or tray, then place it inside the box.
  5. Angle the box toward the sun, using a propped-up piece of cardboard as a reflector, and let it sit until the s’mores are melted and gooey.

Solar power is an essential renewable energy source, and Arizona is one of the top states for harnessing it. Sharing facts about solar energy—like how it’s used to power homes and schools—can make this activity both fun and educational.

This activity teaches kids about renewable energy and how solar power can be harnessed for practical use. It’s also a tasty way to wrap up a day of scientific exploration!

Create a Mentos and Soda Geyser

A Mentos and soda geyser is a high-energy experiment that demonstrates the rapid release of carbon dioxide gas. Simply drop a roll of Mentos candy into a bottle of soda, and watch the spectacular eruption! For safety, be sure to conduct this experiment outdoors.

Steps to Create a Mentos and Soda Geyser:

  1. Take a 2-liter bottle of diet soda and place it on a flat outdoor surface.
  2. Unroll a sleeve of Mentos candies and use a paper tube to help you drop them all in at once.
  3. Step back quickly to watch the eruption as carbon dioxide escapes rapidly from the soda.

Discuss the science behind the reaction and the role of surface area in creating bubbles. Did you know that similar principles are at play in natural geysers like Old Faithful in Yellowstone National Park? Geysers are caused by pressure buildup in underground chambers, making them nature’s own soda fountains.

Observe the Night Sky

Observing the night sky can introduce kids to the wonders of astronomy. Use a telescope or binoculars to spot planets, stars, and constellations. Download a stargazing app to enhance the experience and learn more about celestial objects.

Steps for Stargazing:

  1. Find a location away from city lights, like the Holt and Miller Observatory 
  2. Bring a telescope or binoculars for closer views of celestial objects.
  3. Use a stargazing app to identify constellations and planets visible that night.
  4. Encourage kids to draw what they see and research their favorite celestial objects.

The Holt & Miller Observatory houses our 10” Carl Zeiss Refracting Telescope, one of the largest historical artifacts in our collection (FI Cat.1437). During daytime hours, this fully functioning telescope provides the opportunity to safely view the Sun, including features such as sunspots and prominences, while the rooftop location offers a unique view of the Philadelphia Skyline.

Make Science an Adventure for the Whole Family

Opportunities for young minds to engage in fun and educational science experiments. From creating explosive geysers to exploring the wonders of the night sky, these activities provide memorable experiences for the whole family. Let your child’s imagination soar as they discover the fascinating world of science—right in your community!