What colors are hidden in markers? Learners will use chromatography to discover the different pigments hidden in markers. Then, use that chromatography to create beautiful flowers out of coffee filters.

Use your understanding of Mars or another planet to construct a model of a plant or animal that has the critical features to survive on that planet.

In this activity, you will be an engineer and build your own towering structures using just mini-marshmallows and toothpicks.

Think about last week: did it rain or snow? Do you know how many inches of precipitation your backyard received? Build your own rain gauge to monitor precipitation.

Some modern turtles swim thousands of miles to lay eggs on the same beaches where they were hatched. Scientists believe that they use magnetic fields to navigate the vast oceans and find the those beaches. Use magnets to navigate like a sea turtle.

Make some artwork in motion using a few simple ingredients, and use it to better understand the science of soap!

Learn about the Festival of Color with the book by Kabit Sehgal and Surishtha Sehgal. Then make your own explosion of colors with some milk, food dye, and dish soap!

How much is one million? In this activity, learners will estimate the distance they\'d need to walk to take one million steps.

Build a miniature biome using household items and observe how plants grow in different conditions.

Try making your own mint fireworks in a dish with just a few simple supplies!

People from all over the world are fascinated by mummification - a process that preserves a corpse. Some cultures have developed methods of mummifying their dead, perhaps most notably ancient Egyptians. An important part of the process they used was desiccation, or drying out of the body. In this activity, use baking soda to desiccate a hot dog.

Mushrooms contain spores that help fungi reproduce. In this activity, visualize the mushroom spores by making a print.

In this exploratory activity, see if you can create a water lens. Explore refraction with water in a ziplock bag. Then see if you can make a convex droplet of water that will magnify an image.

Newton\'s First Law of Motion states that an object at rest will stay at rest and an object in motion will stay in motion unless acted upon by an unbalanced force. Have fun experimenting with Newton\'s First Law of motion!

Read along with us as we hear about the story of Bartholomew and the Oobleck, then make some oobleck of your own!

Optical illusions like those found at COSI can be mesmerizing! In this activity, make a simple optical illusion called Benham%u2019s Disk that will be fun to play with long after you first make it.

Learn about the unique adaptations of owls by playing a game that simulates the way that owls chase their prey.

Our lungs help us every day to breathe in air and get the oxygen we need. Build a model of your lungs as you explore the human respiratory system!

Have you ever thought about how far the planets are from one another? Create a model of interplanetary distances!