This will be the first gif-fest of 2020. (Note: some gifs are fuzzy when first viewed, but if allowed to buffer and be replayed, they become sharper).
A man builds an indoor treehouse for his kids.
Origami pockets within pockets
Why you should wash your chili peppers
Drone clears leaves from a woodland path
Art created with a pendulum
Impressive password (but lacks numbers for security)
Next-level electric bike
Teleportation caught on security camera
Creating a stencil in concrete
Seashore sand art
Nature and Science
A desert "sandfall" (these are actually sand-laden waterfalls in wadis)
Bionic limb demonstrated
Time-lapse of snowfall in Newfoundland (more here)
Sea foam in a Spanish city street
Sympathetic resonance demonstrated in (silent) gif
Pet coyote plays with cat
Mother stork discards one of her chicks
I've encountered stick insects in the Minnesota woods, but this one must be tropical
An Australian family saved koalas from the wildfires
Head stability of a kingfisher
Bear does vertical rock climb
Woodpecker feeds from a man's hand
Dog in Lima, Peru on a skateboard
Viper defensive motion
I've lost the backstory, but the result is obvious
Child walks on a ledge (no injury)
Terrible bicycle/railroad crossing
Young boy learns basic physics
There are ways to clear snow from patio furniture; this isn't one of them
Impressive or clever
This man has obviously chopped firewood before
Frosting a cake
Awesome optical illusion
Cats-cradle in the form of a star
Cutting spinach noodles
How to make a cloud
Pianist practiced the wrong piece for a concert performance - still nailed it.
Australian wildfire footage. Note the very brief time from danger to catastrophe.
Sports and athleticism
These are called "strap-on leg sleds."
Wheel-thingy in a gymnasium
Jump into the lake holding a rubber ball
Amazing lawn bowls shot
Three-point behind-the-back shot
Man makes "Zamboni" for neighborhood ice rink
Humor or cheerful
Dog helps girl during her workout
After getting treat, dog does "zoomies"
Stolen dog returned to its owner
Great Dane service dog
Father of alopecia girl has her shave his head for an awareness video
The embedded images are selections from extensive galleries of photos of trivets at Trivetology - an interesting blog compiled by a TYWKIWDBI reader.