Yes, that's possible. I was 5 when I was molested by a 13 year old. Honestly, if there's a significant age difference, I don't believe it's childhood sexual exploring at all. It's one thing if it's two 5 year old kids. It's another thing entirely when there's a significant age gap. When a child is sexually abused by another child, I've read that it's called child on child sexual abuse (COCSA). If this happened to you, I'm very sorry. I know that it's tough. Just because another child molests a child doesn't make it any less traumatic and it saddens me that people think it is. That's why it took me a long time to get help for my abuse.