What is Hexy’s software environment? It’s Arduino-based, right?
If so, is there any chance that it could work with Modkit? modk.it/ is an open source IDE (which recently did a successful Kickstarter, so you have that in common) for Arduino development that makes it as kid-friendly as the Lego Mindstorms, which feels like a natural fit with Hexy. I know that my 7 year old son would LOVE to be able to program Hexy after building it.