Design a 2048 x 1152 pixels and 6MB or less YouTube channel banner for an account named 'Charming & Bonza Boys'. The overall theme is Australian and it caters to 8 and 9-year-old boys who are fans of basketball and Roblox games. The banner should effectively depict two boys seen from the back, labelled appropriately as 'charming boy' and 'Bonza boy'. Their silhouettes should be present at the forefront as the hosts of the show. Imprint some Australian symbols like the Kookaburra, Kangaroo, and the Sydney Opera House in the background subtly. Integrate the primary objects, a basketball and a hint of Roblox, subtly within the banner's design. Ensure all elements blend together harmoniously to create an engaging and dynamic environment. See more