The world is running surprisingly low on sand. Humans have found a staggering variety of uses for sand, from glass and concrete to electronics and artificial islands. And natural sand production is a slow process — mountains weather down to smaller and smaller rocks over eons — so it’s not shocking that sand is often harvested at a faster pace than it’s replenished.
But sand scarcity is more complicated than that. Sand is cheap to mine, but its weight and bulk make it extremely expensive to transport. And not all sand is alike: the particular shape and composition of individual sand grains is crucial for huge sand consumers like the concrete industry. So sand scarcity really comes down to where sand is found, where it came from, and what it’s made out of.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.