There is no better way to learn electronics and wearables than building and programming your own. Adafruit’s latest project shows you what it takes to build your own motion reactive LED costume ears with Playground Express and MakeCode. You are also going to need a Neopixel strip, LiPoly battery, on/off switch, and a few other simple parts.
These cute ears light up with movement to draw attention to you. More information is available here.