One great ornament idea is to make a Santa ornament out of a used lightbulb.
The familiar lightbulb sea squirt also multiplies by budding, with the zooids remaining attached at the base to form colonies.
Note: This same trick will happen with the lightbulb that appears when your dog reacts to a new trick.
If you've never seem a tea light lamp before, they're basically lamp-shaped candle holders, complete with shades, that use a tea light candle instead of a lightbulb for illumination.
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