Hello, I'm IndDesigner ---
Yes, I'm an industrial designer; my crowd funding project is a set of awesome glowing blocks that I designed & invented specifically for children on the autism spectrum, but as it has turned out, everybody else seems to love them, too. They really are awesomely irresistible.
No language, instruction, batteries, parts, LEDs, power packs or anything except themselves are required. Relying on ambient, specific, and/or natural light----yes, they even work in full moonlight. Response and orders have come from around the world: as far away as NZ!
Take a look:
https://www.kickstarter.com/projects/28 ... ght-blocks I will be delighted to comment on your project(s) if you do the same for mine!