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Visitors observe a bottle with a balloon attached around the mouth. The bottle contains a solution of yeast, sugar, and water.

In this math-based activity, learners model the intensity of light at various distances from a light source, and understand how astronomers measure the amount of sunlight that hits our planet and othe

In this Engineering Design Challenge activity, learners will use balloons to investigate how a multi-stage rocket, like that used in the Interstellar Boundary Explorer (IBEX) mission, can propel a sat

Learners investigate a pre-constructed mystery tube to determine its interior mechanism.

In this activity, learners will experiment with changing flower colors. Learners will investigate the effects of acids and bases on flower colors.

In this activity, learners explore temperature changes from chemical reactions by mixing urea with water in one flask and mixing calcium chloride with water in another flask.

In this activity, learners use tonic water to detect ultraviolet (UV) light from the Sun and explore the concept of fluorescence.

This trick from Exploratorium physicist Paul Doherty lets you add together the bounces of two balls and send one ball flying.

This fun and simple hands-on astronomy activity lets learners explore the difference between telescope magnification and resolution.

Learners mix a solution of luminol with hydrogen peroxide to produce a reaction that gives off blue light.

In this activity, learners take apart a used zinc-carbon dry cell battery.

Based of the The Tech Challenge 2015, learners will engage in two mini-design challenges related to seismic engineering.

Learners combine hydrogen peroxide with three different forms of potato: raw chunks, ground chunks, and boiled chunks.

In this activity, learners will explore how and why weight distribution works.

Make a model city happier with LEDs, circuits, motors, and batteries! Groups can think, discuss, design, and build what would make a community happy. Kids can work as part of a team or on their own.

In this activity, learners will write a secret message that only their friends will be able to read.

Break open that used musical toy and squish some Play-Doh over the circuit boards, and you will hear some weird and distorted sounds the manufacturer never intended!

Learners observe a flask with a balloon attached over the mouth and inverted inside the flask.

In this activity, learners perform a simulated blood test procedure.

In this physics demonstration, learners are challenged to insert a straw the furthest into a potato.