DIY.org is awesome while kids are in the experimental and exploring phase. They supply an extensive database of skills and challenges as well as providing inspiration from seeing other maker's projects.
There comes a time when the kids have explored the skill areas that interest them and begin to specialize. There is often a gap in between when that happens and the child turning 16, thus having more options available to them.
During this time, makers can continue to share their work on their diy.org portfolio, but will seek other options for guidance in finding resources, connecting with other specialists, and where to gain inspiration from those who are more advanced than they are in that particular skill set.
If the kid has the same interest as their parents, this transition may go pretty smoothly. Others may find it a bit challenging. That was our situation. Neither myself or my husband are knowledgeable in the fields our older two children have decided interest them most.
What kids can do is continue diy.org's framework by creating custom skills and challenges. Ask them what interests them and what they are curious about. Think beyond the skills and challenges that diy.org has available. (Although diy.org has a variety of skills, there is no way to cover everyone's interests.) Kids can create a skill and challenges using any topic imaginable.
So the kid shares either a new skill area, existing one they'd like to go beyond diy.org's content with, or sets a goal of something they'd like to do say in the next 3-6 months. They create custom challenges to learn more about those areas, brainstorm what resources are needed and where to find them, and look for those with more experience in that area to gain inspiration from. You help them network and hang out where those people are found. Sometimes that requires finding a coach or mentor to help brainstorm ideas and field specific resources for networking and stretching skills.