Open Source Turtle Robot by MakersBox
Turtle robots are controled by simple instructions like “forward(distance)” and “left(degrees)”, and their visual tracks are instructive as well as entertaining. They also demonstrate how systems with simple rules can have complex behaviors, something we see in nature all the time. Assembly instructions at https://www.instructables.com/id/OSTR/. The current Bill of Materials is located at: https://github.com/aspro648/OSTR/.