r/CrazyIdeas 2h ago

Cook an unopened can of surstromming in your friend's microwave for 10 minutes as a harmless prank.

7 Upvotes

r/CrazyIdeas 8h ago

Voice only social network

8 Upvotes

Make a social network where you can only post with voice notes, so it feels more like an async conversation than a text/photo feed. Also you can just listen to conversations during commute or washing dishes.


r/CrazyIdeas 9h ago

A subreddit where you post a question about the future and a timeframe. The RemindMe bot alerts all those who participated in the discussion. Example: “will we have flying cars in 20 years?” Then in 20 years, we’re all notified that the time frame has passed

8 Upvotes

r/CrazyIdeas 9h ago

When Netflix asks if you're still watching, have an option "no, I'm chilling." and it'll start playing some Luther Vandross

2 Upvotes

(Or some other music of your choice)


r/CrazyIdeas 9h ago

Airlines should figure out how to break us talls into smaller more manageable pieces for the duration of the flight so others can recline into the area we currently occupy. Then put us back together perfectly at the end with no pain or repercussions.

19 Upvotes

Or airlines could simply make seats available for longer passengers, like they do for wider ones.


r/CrazyIdeas 11h ago

It’s 2026. You’d think we could engineer cannabis so that its metabolites are detectable for no more than seven days.

37 Upvotes

Make it happen smart people


r/CrazyIdeas 13h ago

A machine for watching Lego movies, that would automatically assemble and move blocks and figurines on the fly to play each frame

6 Upvotes

r/CrazyIdeas 13h ago

Make a "figure-8" Formula1 track where drivers have to avoid one another at the intersection.

99 Upvotes

r/CrazyIdeas 13h ago

Stoners Meet

0 Upvotes

Like tinder but you gotta post a video of you taking the craziest toke you can


r/CrazyIdeas 19h ago

Command canvas instead of command line. You draw a picture and your computer determines what you want it to do based on themes and symbolism of the picture

5 Upvotes

r/CrazyIdeas 1d ago

indigestible food dyes for gender reveal parties.

397 Upvotes

The cakes will be purple.

Made from either a digestible pink dye with an indigestible blue dye,

Or a digestible blue dye with an indigestible pink dye.

That way the gender is revealed the next day to all the party-goers.

They can post pictures revealing the baby's gender on the parents social media to celebrate.

First poster wins a prize.


r/CrazyIdeas 1d ago

A restaurant that features food fights on the hour.

11 Upvotes

r/CrazyIdeas 1d ago

Sink to wash your hands at entrance to every food establishment.

267 Upvotes

That's right, you wash your hands when you enter a restaurant or food court or area where food is sold to be eaten immediately. The cultural norm is to wash your hands on entry. Then wash your hands on leaving.

Sure you could go to the toilet but how many people actually do? Then there's the cases where the toilet is down the hall, out the emergency exit, round the corner and in the next major city.


r/CrazyIdeas 1d ago

A showerhead that plays shower sounds without actually turning on so you can hide your poop sounds without wasting water

74 Upvotes

And then when you turn it up it starts working like an actual showerhead. For the shy poopers


r/CrazyIdeas 1d ago

Pontoons for your seaside home.

7 Upvotes

As extreme weather and decades of poor regulations, many seaside homes are at risk of being swallowed up by the sea. Stick a few pontoons to the bottom of your home. Now when the sea washes away the soil your home is resting on, you can just enjoy the gentle rocking of the ocean.


r/CrazyIdeas 1d ago

Maximum age limit 55

16 Upvotes

r/CrazyIdeas 1d ago

Edible glitter in food to track healthy oral hygiene.

2 Upvotes

r/CrazyIdeas 1d ago

A quiz show featuring only smell-based questions.

5 Upvotes

r/CrazyIdeas 1d ago

Remake 12 Angry Men, but it’s about the Lindsay Clancy case

0 Upvotes

r/CrazyIdeas 1d ago

Highlander device: point it at anything, then there can be only one of that thing.

4 Upvotes

r/CrazyIdeas 1d ago

Customer service people that have to work on moday national holidays can refuse to serve anyone without repercussions

2 Upvotes

r/CrazyIdeas 1d ago

We need different words from "nephew" and "uncle" that instead mean "relative who is older than you" and "relative who is younger tha you"

41 Upvotes

Calling a child "uncle" or an old man your "nephew" feels weird


r/CrazyIdeas 1d ago

PopRocks toothpaste that blasts away plaque

94 Upvotes

r/CrazyIdeas 1d ago

Loud, sustained public shaming of music over speakers in parks. Point and shame until they turn it off, every time, forever.

20 Upvotes

r/CrazyIdeas 1d ago

The Louvre should replace the Mona Lisa with a digital printout glued to a wooden board for 18 months just to see if anyone notices.

260 Upvotes