I'm interested in the DrTechniko workshop materials on Devoxx4Kids. Can you tell me what core programming concept it teaches, what tools are needed for participation, and how I can contribute new signs or materials to Devoxx4Kids workshops?
Navigate to the 'Materials' section of the website. From the 'Materials' page, proceed to the 'Workshops' section. 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. Determine the method for contributing new signs or materials to the Devoxx4Kids workshops (this information is available on the 'Workshops' page).
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.