When I was young me and my nephew touched each other some, it didn't last. I suffer from depression and have been to counseling, I ask him about it he said its normal for kids to do that. He also said don't punish them to make them think its a bad thing. If you want to say anything tell them anything, teach them about people are not suppose to touch there private parts because they may think it is ok for anybody to do that.
I would just keep an eye on them, maybe keep them busy or make sure there not alone. My 6 yr old sons school had somebody to come by and talk to his class about what is ok and what nots ok. You might go online and find out how to tell this to your children.
Be careful about who you tell, my son was in daycare a couple of years ago and he started masturbating, he is also ADHD and impulsive, so he decided to do it at daycare, some lady come from the public school and saw it and it was a sign of sexual abuse, the daycare worker had to report it to keep from losing her license, but she told them she didn't beleive it and nothing ever become of it, come to find out the lady had only raised girls. Don't let this get you upset, most people know this is normal for kids, especially boys.
If you son starts masturbates just tell him its a boy thing and he has to do it in private. Some boys never do it I guess its the different in there testosterone. My son goes to his closet.
Hope this helps
Karen
I would understand if they were just cuddling, but it sounds like they were exploring or "practicing" what they have seen or heard about. I would be very cautious. Get them to tell you what they were doing (without feeling like they are bad). You may wish to get them to a therapist. I would also separate the children (even if you only have one spare room) and put jingle bells on the door knob so you can hear if one of them gets up.
Nothing else may come of this, but it is better to be safe than sorry.
Good luck and God bless.