I made this blinking-creature-eyes lamp as a small gift for my
father, who loves to scare neigborhood children during Halloween
with a heavily decorated entryway. It's suitable for hiding in
foliage, under a chair or couch, in a darkened window, etc. You can
make one easily if you have a laser cutter and some way of making
printed circuit boards, although a cardboard box with cutout eyes
and some LED strip would work just fine as a quick way to get
started.
PCB design in Eagle
This design was heavily determined by parts I happened to have on
hand. The LEDs are high-brightness red 5mm devices; I bought a
whole sack of these once
from Electronics
Goldmine (they made an appeance in the Goldfinger
laser among other projects). Although I could have controlled
the blinking with a 555 timer or similar circuit, I had some surplus
Arduino Trinkets from Adafruit, and programmability is nice to have
in a project like this one.