TBM (Tiny Bit Machine)
This is a small solar powered device that uses a supercapacitor instead of a battery. Its brain is an attiny85 running a modified version of [GORK] called [TGRK] (Tiny General Reusable Keywords), which is a minimal interpreter written in C.
The device can be programmed using 5 buttons. And the 2 LEDs are used as output indicators. TGRK is broken down into "keywords", each of which are 8 bits (4 bits for prefix, and 8 bits for instruction).
I originally built this device for HACKADAY.IO's [Tiny Games Contest], here is a link to [the hackaday.io project page] where you can look at the developement logs if you are interested.
If you want to build your own TBM, you will need a soldering iron, solder, and all the components. You do not need to know C programming to use the device unless you want to modify the TBM "OS". If you want to use the device you will need to learn [TGRK], which is pretty simple on par with BASIC.
Below are the links to instruction pages for TBM:
I do plan on putting together kits and selling them on Tindie if enough people show interest in the device. But everything is and will stay open source for anyone wanting to build their own from scratch.