I second what Teeki said. It really isn't a problem at this age - she's 6 and from what you describe, I wouldn't call her overweight. If she's wearing clothes from the womens section then there may be an issue, but really, she sounds just fine to me. My 6yo son gained 6kg over the school holidays and it blew me away how much he'd gained, so maybe it's a growth spurt that they go through at this age? You are doing everything *right* by making sure she's active and supporting better food choices for her so it's a matter of let her grow as she is meant to grow.