How junior olympiads (grade 8 or less) look like in your countries? Can you share some info/your experiences/links?
In Poland, we have an annual contest with three stages (first online, second and third onsite). During the first stage, we also have a test checking language proficiency (C++ or Python) and the ability to solve algorithmic puzzles. During the final stage, top X contestants are selected to attend the preparation camp and the EJOI.