Hi!

I'm looking for a movie or a TV show that came out anytime between the 90s and 2005 max as I remember seeing it when I was very little and staying with my grandma. It followed a group of kids who I guess had formed a secret society of some sort. The scene I remember most vividly is one where they secretly meet up in a cave without their parents knowing. Unfortunately, I don't remember much more. Every Google search I've done shows movies about treasure hunting or otherwise exploring caves but here the cave itself was never used for anything other than a meeting point.

Please help!

Edit: I believe the main character was a guy but I think the focus was more on the group rather than individuals. It wasn't anything animated and had more of a mysterious feel rather than them being spies or something.

Edit 2: The group consisted of both girls and boys probably ages 9-13. I don't remember anything supernatural or scary, definitely not a horror. Felt more mischievous and fun than anything.