In terms of their health, I will agree with food. I will also put it to you that children need some place green in which to kick a ball around, fly a kite, play cricket, whatever. In some places in the western world parks are shrinking, even disappearing. This not having a place to hang out and smell the grass isn't good for either their mental health or physical health. Obesity can best be tackled when the child is young and kicking a ball around is fun.