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In this activity, learners of all ages will roll a ball coated with paint to artistically visualize the motion of the object.

In this activity, learners create painting machines that can paint moving forwards and backwards.

In this activity, learners design and build a toy top out of simple, everyday materials and have the option to use the toy as an artistic tool.

In this activity, learners explore sound by constructing their very own banjo out of a coffee can. Learners experiment with the canjo to change the instrument's pitch and timbre.

In this engineering design challenge, learners animate a facial expression and make a machine (zoetrope) that plays the animation back.

In this activity, learners create a traditional Mexican noisemaker (a matraca) using cardboard, craft sticks, and a wooden dowel.

In this activity, learners create night lights using a plastic cup, programmable PICO Cricket, tri-color LED, and sensor.

In this activity, learners use clear nail polish to create a beautiful iridescent pattern on black paper. Learners discover that a thin film creates iridescent, rainbow colors.

In this activity, learners transform everyday milk into small plastic figurines and jewelry. Use this activity to introduce learners to monomers and polymers.

This is a simple activity for learners to create a traditional musical instrument. Pan Pipes have developed all over the world in different cultures, from South America to Greece and China.

In this activity, learners build a musical drum using a cardboard tube, plastic wrap, and beads.

From this How To slide show, you create an Audio Tape Bow that can play distorted audio sounds by running it across a tape head.

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!

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

In this activity, learners will construct an air cannon as a model for the human ear.

In this activity, learners will discover how to make butter from scratch. One optional tips includes adding marbles to speed up the process.

Learners will explore the chemistry of mucous and its importance to our health by following a process to make their own replica "snot." The activity includes a time and age recommendation, a materials

Learners make a mobile model of a carbon atom using clay, wire, and pipe cleaners.

Learners assemble a hot-air balloon from tissue paper. The heated air (from a heat gun) inside the balloon is less dense than the surrounding air and causes the balloon to float.

This design challenge is an open-ended exploration of linkages, a group of parts connected by hinges, and the types of motion they can create.