Splits a beam of white light into different colours, and shines them out diffferent orthogonal faces of a cube.
this post was submitted on 29 Nov 2025
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I think infinity mirror's are cool. I want to get a smart gift like that for a friend. But not an infinity mirror. What other cool gift can I order online that's AS COOL AS an infinity mirror? Preferably 20$ to 50$
I think I've found my new go to secret Santa gift
Little piece of bismuth was a good gift I gave, small desk ornament or such
If you're wanting something that makes for a neat, mesmerising visual effect, maybe a plasma ball?
https://en.wikipedia.org/wiki/Plasma_globe
It looks like they're available on Amazon for the mid-to-low end of that price range.
I feel like the novelty of these things wears off almost immediately
X-Files Theme plays
RGB LED strip kit. Can use as backlighting for a mirror or tv, and could later be used to make an infinity mirror.
Why no one has mentioned a lava lamp?
A useless machine
I once had an hour glass that instead of sand it had some sort of slime, it was very cool to watch the bubbles slowly rise up the column.
Those little parabola mirrors that make the toy seem to float above.
Newton's cradle
Good quality Rubik's cube
Prism color cube
I'll list a few that I like but with no links because I don't want to use Amazon and most results that I find are limited to EU based shops anyway so not sure if it helps you. But I am sure you'll be able to look them up
Sand pendulum. Basically a pendulum that draws patterns on very fine sand. If you see them you can probably make one yourself that is even cooler
Double Pendulum, pretty cool to look at
Gyroscopes.
Tensegrity models. Those floating style structures that actually hang
Decorations with magnetic sand or fluid
Rock slings are incredibly fun, you can chuck rocks and balls so far people love to try it, especially kids
This is just a gateway drug to a trebuchet.
I bet you'd love it if we were all launching 90kg objects over 300m away.
This thread just walked me back into Sharper Image circa 2003
Arc electric lighters
I've always thought Galileo Thermometers were pretty cool.
Magnetic sand hour glass
A desktop stirling engine makes for a fun kinetic sculpture. They're powered by temperature differential such as by setting it over your morning coffee/tea or just the warmth of the sunlight hitting it.
Socks.
Awesome, and you can get them in different colors, like grey, or black, or blue, or beige. Not white though. White socks are only for playing sports.
Gonna suggest a kinetic sand table. The tabletop is glass and underneath there's a bunch of sand and a metal ball that rolls around drawing patterns. They're pretty neat.
Euler’s Disc, along with the most solid glass mirror you can find.