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$

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[–] quediuspayu@lemmy.dbzer0.com 20 points 2 months ago* (last edited 2 months ago) (3 children)

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.

[–] pastermil@sh.itjust.works 5 points 2 months ago (1 children)

You say it's useless, but half of internet is running on that. Hint: Cloudflare

[–] Blisterexe@lemmy.zip 0 points 2 months ago (1 children)

more like stumbling, recently

[–] pastermil@sh.itjust.works 1 points 2 months ago

potæto, potáto

[–] spittingimage@lemmy.world 1 points 2 months ago

I bought myself a lava lamp because yes, they're cool. Takes an hour to warm up, though. I usually lose my focus on it before that.

[–] Pat_Riot@lemmy.today 1 points 2 months ago

I love my Useless Box!

[–] ace_garp@lemmy.world 19 points 2 months ago* (last edited 2 months ago) (3 children)

Dichroic glass

Splits a beam of white light into different colours, and shines them out diffferent orthogonal faces of a cube.

Turn music down

[–] can@sh.itjust.works 9 points 2 months ago

Looks cool but I had to laugh at this:

[–] Trainguyrom@reddthat.com 3 points 2 months ago

I think I've found my new go to secret Santa gift

[–] stickly@lemmy.world 3 points 2 months ago (1 children)
[–] ace_garp@lemmy.world 1 points 2 months ago (1 children)

They are alluring. Agreed, those are better.

Any tips on which set is easy to read, and looks the best?

[–] stickly@lemmy.world 2 points 2 months ago

No clue, but the frosted looks easier to read to me

[–] tal@lemmy.today 15 points 2 months ago* (last edited 2 months ago) (2 children)

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.

[–] prole@lemmy.blahaj.zone 4 points 2 months ago

I feel like the novelty of these things wears off almost immediately

[–] The_Grim_Dreamer@lemmy.world 1 points 2 months ago

X-Files Theme plays

[–] FoxyGrandpa@lemmy.world 12 points 2 months ago

Little piece of bismuth was a good gift I gave, small desk ornament or such

[–] titter@lemmy.world 12 points 2 months ago

This thread just walked me back into Sharper Image circa 2003

[–] CameronDev@programming.dev 11 points 2 months ago

RGB LED strip kit. Can use as backlighting for a mirror or tv, and could later be used to make an infinity mirror.

https://a.aliexpress.com/_m0Lnqad

[–] cosmicrookie@lemmy.world 11 points 2 months ago

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

[–] slippyferret@lemmy.blahaj.zone 10 points 2 months ago

Euler’s Disc, along with the most solid glass mirror you can find.

https://youtube.com/shorts/Q8M3Il0Zv68

[–] Zwuzelmaus@feddit.org 9 points 2 months ago
[–] Trainguyrom@reddthat.com 8 points 2 months ago

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.

Here's a fun video talking about stirling engines

[–] emb@lemmy.world 8 points 2 months ago

Those little parabola mirrors that make the toy seem to float above.

Newton's cradle

Good quality Rubik's cube

Prism color cube

[–] shittydwarf@piefed.social 7 points 2 months ago (2 children)

Rock slings are incredibly fun, you can chuck rocks and balls so far people love to try it, especially kids

[–] CameronDev@programming.dev 5 points 2 months ago

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.

[–] CmdrShepard49@sh.itjust.works 2 points 2 months ago

Along a similar vein, my coworker keeps raving about a little toy salt shotgun that he uses to kill flies in his house.

[–] radiouser@crazypeople.online 5 points 2 months ago

I've always thought Galileo Thermometers were pretty cool.

[–] Elextra@literature.cafe 4 points 2 months ago

Arc electric lighters

[–] ThatGuy46475@lemmy.world 3 points 2 months ago

Magnetic sand hour glass

[–] lucullus@discuss.tchncs.de 2 points 2 months ago

If the recipient is technically inclined, then a kit for a mini tesla coil would be cool

[–] Hossenfeffer@feddit.uk 2 points 2 months ago

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.

[–] Addition@sh.itjust.works 2 points 2 months ago (1 children)

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.

[–] CmdrShepard49@sh.itjust.works 2 points 2 months ago

I built one of these (shoutout to V1Engineering) and a $20-$50 budget will get you maybe 10% of the way there.

[–] WolfLink@sh.itjust.works 1 points 2 months ago

I’ve always liked those magnetic levitating globes!

(You can also find magnetic levitating for a variety of tv shows and video games)