Science Fair Projects for 4th Grade


These science fair projects for 4th grade allow kids ages 8-10 to explore science concepts from air pressure to physics and density!

1. Salty Cave Crystals

Grow your own salt stalagmites and stalactites in your kitchen!

You should begin to see some crystals form within the next week! The crystals that grow down from the string are called stalactites. The crystals that grow up from the dish in the middle are called stalagmites. These are small scale models of the crystals that grow in caves!
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The Science of Spring


Tuesday, March 20th was officially the first day of spring! Spring is a time for longer days, flowers blooming, and baby animals. But did you know there’s actually a lot of science behind all these lovely signs of spring? March is a great time to help your kids connect with the world around them and explore the science of spring. Encourage your kids to be observant and ask questions about all that they’re seeing!
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Meet a Maker: Jorgen Pedersen, Robot Designer


Jorgen Pedersen is a professional robot designer! He is the CEO and founder of RE2 Robotics, a company whose robots can defuse bombs and perform other dangerous tasks. Check out our interview with him below 🙂

What inspired you to get into robotics?
I have been intrigued by robots ever since watching Star Wars in the late 1970’s. Frankly, I just thought they were cool. This drove me into learning math and science in school and programming while at home.

What was the first robot you ever built?
The first robot I ever built was called “Sidewinder.” I built it as part of a small team of undergraduates at Carnegie Mellon University with the purpose of entering the Walking Machine Decathlon Competition held in the mid-1990’s. Sidewinder I failed miserably during the first year we competed, not even being able to complete one single event. However, Sidewinder II performed admirably the following year, securing third place and giving me the confidence that I could make a career out of building robots!

Your company makes robots that defuse bombs. Why is that especially important to you?
We build robots to save lives or improve quality of life. One of the most dangerous jobs in the military and in the public safety market is rendering bombs or other explosive devices, such as IEDs, safe. We take human operators out of harm’s way. In short, our robots save lives and there is nothing more important than saving human life.

What advice would you give to someone who wants to create their own robots?
Robotics is the fusion of mechanical, electrical, and software engineering. To create your own robots, I would recommend learning as much as you can about each discipline or surrounding yourself with people who are experts in areas in which you are not. Great robots emerge through collaboration and brainstorming.

This interview was originally conducted for and published in our “Radical Robots” Tinkerzine.

6 Amazing EGG-speriments


The humble egg—it’s incredible and edible. But did you know it’s also a brilliant tool for engaging children in science, technology, engineering and math (STEM)? With a half-dozen of these beauties and a handful of household items, you are ready to get cracking with these amazing egg experiments.

Egg in Vinegar Experiment
With this experiment, we observed and followed a regular egg through a transformation to become a bouncy egg. You can too with just a few repurposed ingredients you may have around the house for Easter!
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Science Fair Projects for 6th Grade

These science fair projects for 6th grade allow kids ages 11-12 to explore science concepts from polarity and density to electricity and circuits.

1. Skittles Science Fair Project

Looking for a fun Skittles science fair project? Try this experiment with your 6th grader – sometimes playing with food is inevitable, but with sweet science, comes knowledge!

The colorful rainbow effect comes as the candy coating dissolves and spreads outward. The candy coating is made up almost entirely of sugar, with a little bit of food coloring. When the sugar dissolves in the water, that adds more stuff to the water around the candy. In other words, you’ve made the water around the candy heavier and more dense. Density is a measure of how tightly packed a material is. The sugar water around the candy has more stuff packed into the same space, so it’s more dense than fresh water. The denser sugar water sinks to the bottom of the dish and flows outward, while the lighter fresh water and food coloring stays on top of the dish.
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