Check out this great Pi powered Halloween scarecrow form Chris Osborn:
I thought it would be fun to setup a prop on my porch for Halloween that did more than just sit there. Of course I came up with the idea very late and so this whole thing was cobbled together in just an hour or two. Looking around my house at a ton of the gadgets I had the idea of putting a Jack-o-lantern on the porch that I could control the light in. Searching the internet for scary Halloween sounds caused things to quickly evolve into adding motion sensors, controlling a couple of lights, adding sound, and putting the pumpkin in the lap of a headless scarecrow.
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.