The C3 National Challenge is an online competition to unleash upper primary pupils' talents (Standard 4 to 6) in creating digital content in Science, Technology and Engineering, Arts as well as Mathematics. With the mentorship from the CEO@Faculty Programme 2.0 Cycle 3 fellows from the academia and selected companies from the industry, this competition will inculcate Higher Order Thinking Skills among the participating pupils on the subject matters learned in schools. As C3 simply means Creative, Critical, Content -- this competition also aims to elicit the creativity of the participating pupils in crafting their own short videos that showcase their critical understanding of academic contents in many creative ways.