Those of you who have spent a bit of time in a lab have probably seen shakers and other fun equipment. Care to build one for your own projects? Adafruit has shared a guide that shows you how to build a Crickit Lab Shaker. It is built on a DC motor with Circuit Playground Express. The speed is adjustable.
You can program the shaker through MicroUSB. A 3D printer is needed to complete this project.