I am planning on going camping this weekend and my 5 year old told me he wants to come along. Have anyone hung with young children? My main concern is him staying warm. It's suppose to be down into the mid-40s.

He'll be in an Eno DN (unless he ends up sleeping with me in my WBBB. Thought of putting a Nalgene with hot water in the hammock with him.

Any thoughts/advice (about keeping warm or anything else) is appreciated.