I'm interested in the DrTechniko workshop on Devoxx4Kids. Can you tell me what programming concept it introduces, what materials are required for the workshop, and how I can contribute new signs or educational content to Devoxx4Kids workshops in general?
Navigate to the 'Workshops' section of the Devoxx4Kids website. Locate and access the 'DrTechniko Materials Page'. Identify the core programming concept taught in the DrTechniko workshop. List the main tools required for the DrTechniko workshop. Identify how to contribute new materials or signs to Devoxx4Kids workshops.
State that the DrTechniko workshop teaches programming concepts without a computer, focusing on defining paths. List 'paper and colored pencil' as the main tools required for the DrTechniko workshop. State that new signs or materials can be contributed via a GitHub pull request.