How do I handle different children's and adult belts?

Use a series marked Separate path for children's grades: Grade system > Add a series (or Edit the series) > tick "Separate path (e.g. children), outside the main line". The Judo, Brazilian jiu-jitsu and Taekwondo WT templates already have one.

• A student on a path moves forward along that path (next grade = the following one in the series).
• At the end of the path, the screen shows "End of this path.": the owner uses Award another grade to move the student to the main line (e.g. an adult belt).
• "Children" and "Adults" groups can share the same curriculum and the same system.