Aside from the obvious (obesity & health problems) the child will not learn to like healthy foods, and the child will not get the proper nutrients to be able to do what children do best. Play is such an important part of childhood, and if the kid doesn't have enough energy to go outside and run around, they are really missing out.
He will get FAT and end up with Diabetes and many other ailments.
There are a lot of good answers on here. You're kids mood and self esteem could also suffer one day from this.
Fat, early onset Type 2 diabetes, weakened heart function, endocrine system malfunction, premature onset of puberty and social opprobrium from peers.
Geez. Wake up.
At worst, bad eating habits. I suggest you instill a healthy diet from a young age, emphasizing nutritional content over taste, also try to make the kid do some sports, something that would last a while.
I personally started exercising and taking care of my food when I was 12, now I'm 24 and to this day I still exercise and eat healthy. It helps having a good role model or fatherly figure.
Besides health issues, the child could also develop depression as a side effect from being overweight or because they can't do the same things their friends can.
obesity future heart problems diabetes, bulling, inactivity ie unable to do exercise at school, shortness of breath, bad skin.
Health problems, becoming, fat, underactive and unproductive in their lives
Obesity..among other health issues that I don't know the specific terms for.