Kairos is a spiritual retreat which is confidential. What happens there, remains there, so you will not get one definite description of what the retreat is like.
It is founded in magesterial teaching.
It has structure.
But it is put together and led by peers under the guidance of a director.
Bottom line is these retreats cut off all real-life communication for a weekend so that the participants can only focus on Our Lord and His call for them.
It is making time to listen to God, to come to know Jesus personally, individually, to establish a real relationship with Him to carry back into the ‘real world’ so that He sustains you.
The leaders’ role is to provide the structure, the environment, the atmosphere, the opportunity - through talks, devotions, mass, games - for such relationships to develop.
Whether or not each participant makes that connection for themselves is up to the participant and the Holy Spirit. This is why some kids walk away unphased, others are totally moved and change the course of their lives.
As with all lay ministry groups, including Why Catholic, Bible Studies, RCIA, etc., if a director or pastor overseeing the director is not ‘magesterial’, so to speak, elements of the retreat can be askew. However, and this is a big HOWEVER, never underestimate the power of the Holy Spirit in these gatherings. Sometimes, through the kids, a wayward director can find him/herself on a new path. Spiritual growth happens at these retreats, that is for certain. For whom, and to which degree, is very personal.
For your children, I would sit down to speak with the director overseeing the retreat. If you have concerns about the direction of the retreat, I would pray about it while your children attend, but I would not bar the children from attending. Have faith in the Spirit and most importantly, in the faith you as the parent already instilled in your children. They will be in God’s hands for the entire retreat, regardless of the director.
My two teens have been through 3 Kairos retreats already. They attended the first as part of their confirmation preparation, the other two, they served as Kairos leaders. They have grown tremendously through this program, but some of their peers did not go on to become leaders and have still struggled a bit through high school. However, even those kids keep ties with the rest of the group, and the rest of the group continues to reach out to them to help them with real-life issues and the kids do attend mass regularly.