What do you tell your young kids about your weight loss?

My daughter is 5, but I shared your apprehension that she could pick the wrong idea that "food is bad" or something like that.

So, I told her almost since the beginning that I was going to be healthier so that I could play better with her and I always found a way to tell her how she is perfectly made, how her body is as it should be.
I told her that I was overweight because I ate too much, while she was eating the right amount, since she is also very active.
We discussed the idea of "energy" from food, and she seems quite satisfied by my explanations.

My daughter became my best supporter, she checks my progress and doesn't seem bothered at all with her food intake or whatever. So, let's hope!

I have four stepchildren, and I want very much to keep my weight loss positive and help them see exercise as fun, not as drudgery to burn calories. I rarely, if ever, say anything about my weight loss efforts, because I don't want them becoming obsessive about weight. So when I work out, I tell them it's fun, and they join me sometimes, which is great. When we are at the park, I make sure they see me running around and playing there too, so they see that all forms of activity can be fun. I tell them I just want to be healthier. I never, ever let them hear me moan about being fat, or how something I ate was bad, or any of the negative things that I don't want them to pick up.

My approach is to keep it as positive as possible and focus on being strong and active and confident.