I think one of the most engaging and beneficial types of clubs for kids would be environmental and outdoor-focused programs. This could include anything from gardening and nature clubs to outdoor adventure groups, like hiking and scouting teams.
For STEM-focused clubs, there are numerous options that kids might find appealing, such as robotics teams, coding clubs, or science experiment groups. Arts programs can also be a hit with young members, whether that's through music, dance, or visual arts clubs.
Another category that tends to attract kids is sports-related clubs, like soccer, basketball, or flag football teams. I've also seen community service groups specifically designed for kids, which can help teach them valuable life skills and develop social responsibility from a young age.
As for specific examples of successful kid-focused clubs, one that comes to mind is the "4-H" program, which has been around for many years and focuses on leadership development, STEM education, and community service, among other areas. Another example would be the "Boy Scouts" and "Girl Scouts," which provide various experiences related to outdoor adventure, environmental stewardship, and life skills training. More recently, I've seen a rise in interest in clubs focused specifically on arts and technology, like chess clubs or coding camps.