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Magical Science: Rain Cloud in a Jar

Fun science experiment to do at home

By Melissa Baltazar July 17, 2025

Looking for a fun, screen-free way to keep your kids engaged during summer downtime? Simple at-home science experiments are the perfect mix of entertainment and education—and a great way to spend quality time together between camps or lazy afternoons. Kids love the hands-on experience of exploring how the world works, and these little projects often spark big curiosity. One magical experiment to try is the Rain Cloud in a Jar—a mesmerizing activity that teaches children how rain forms, using just shaving cream, water, and food coloring. It’s colorful, easy to set up, and feels like a bit of science magic right in your kitchen.

Magical Science: Rain Cloud in a Jar

Supplies Needed: 1 large clear glass jar or cup (mason jar works great)

Water 

shaving cream (white, foaming kind)

Food coloring (any colors you like – blue is classic for rain!)

Small bowls or cups

Droppers, pipettes, or a teaspoon


Instructions: Fill the Jar

Pour water into your jar until it’s about 3/4 full.

Add the “Cloud”: Gently spray a thick layer of shaving cream on top of the water to create your fluffy “cloud.”

Prepare the Rain Colors: In small bowls or cups, mix a few drops of food coloring with a little water. Use one color or several for a rainbow rain effect! 

Make it Rain: Using a dropper or spoon, slowly add the colored water to the top of the shaving cream. Watch closely—once the cloud gets full, the rain will begin to fall into the water below! 

Observe the Magic: The colored water will drip through the “cloud,” mimicking real rain falling from the sky in this magical, hands-on water cycle experiment. 

Time: Prep Time: 5 minutes

Experiment Time: 10–15 minutes

Difficulty: Easy. Kid-Friendly: 

Mess Level: Low (put a towel under the jar for easy cleanup)