Axemantreefull
Axeman writes in –

“This is my personal solution to the universal problem “How can I have a christmas tree AND three cats in the same house?” – A small tree (a little more than 6 inches high), an omnipresent PIC microcontroller that pseudo-randomly drives 8 high power LEDs, 4 rechargeable AA batteries, a little box as base, and that’s an art attack!”Link.

Schematic and HEX included.