At my kids school they don’t celebrate Halloween, but they have a yearly crazy hair (or hat) day. And of course I can’t simply get some purple hair spay and be done with it. Not even close.
Last year I made a Mr Krupp hat from Captain underpants for my daughter:
And a lawn mower for my son:
This year my daughter will be wearing a lighthouse, specifically this one:
In Fusion 360 it currently looks like this:
Inside there are two AAA batteries, a Boost converter and an Arduino Pro Micro clone:
A small incandescent light bulb makes the light, the windows will be laser cut out of some sort of transparent plastic. The small groove is for inserting some hand rails laser cut from heavy paper.
Everything else will be laser printed in white PLA, then painted with acrylic paint. The whole thing is only 15 cm tall, which makes many of the features a bit small.