LED “Swimmies”

Craft & Design Technology
LED “Swimmies”

What happens when you cross an LED Throwie with a Koi fish? You get LED Swimmies, a.k.a. Lightfish. Basically they’re just a Throwie sealed inside of a colored plastic fish. Artist Karl Klar did an installation of 500 of these Swimmies (which don’t actually move) in the pond outside of the new Ars Electronica Center being built in Linz, Austria. Visitors to the site were given fishing poles with magnets on them to “catch” a souvenir to take home. These would be cool to put in a home pond or pool for a nighttime backyard party.

How to create a lightfish – Link


  • LED Throwies coverage on MAKE: Blog – Link

8 thoughts on “LED “Swimmies”

  1. LED “Swimmies” wurx says:

    “What happens when you cross an LED Throwie with a Koi fish?”

    Answer: An environmental disaster.

    Love the idea of throwies, but I hate the environmental impact. Think before you throw….such a waste.

  2. cavalaxis says:

    Do you remember those tub-side insta-jacuzzi things? It was basically a pump that you hang on the side of the tub? You could use one of those to add a current to a pool for a party!

  3. Sally599 says:

    They make these in rubber ducky shape too, 3 LED colors flash in a sequence.—3 ducks for $5, cheaper than you could make them at the local grocery store.

  4. samurai1200 says:

    damn hippies…

Comments are closed.

Discuss this article with the rest of the community on our Discord server!

Gareth Branwyn is a freelance writer and the former Editorial Director of Maker Media. He is the author or editor of over a dozen books on technology, DIY, and geek culture. He is currently a contributor to Boing Boing, Wink Books, and Wink Fun. His free weekly-ish maker tips newsletter can be found at garstipsandtools.com.

View more articles by Gareth Branwyn


Maker Faire Bay Area 2023 - Mare Island, CA

Escape to an island of imagination + innovation as Maker Faire Bay Area returns for its 15th iteration!

Buy Tickets today! SAVE 15% and lock-in your preferred date(s).