If you’re looking to one-up the basic store-bought decorations, and maybe teach your kid the basics of an Arduino while you’re at it — why not build a Peek-A-Boo Ghost! Using an Arduino ...

And at just $10, I'm adding this one to my collection faster than you can say "boo." The ghost pillow ... "So happy that I was able to get this cute little ghost pillow!" one five-star reviewer ...