Rockin' around the Chemistree

The most standard, most common chemistree out there involves glassware filled with colored water.

Or, at least, I assume that's what's in the glassware. I mean, those could be actual solutions of metal complexes, but that would be much more work.

The other chemistree option is to use an absorbent material to make a tree shape then to soak that material in a mixture of laundry blueing and ammonia.