Watching cartoons while eating is a bad habit and you should work on them to get rid of it. Firstly we try to engage kids in physical activities like different supports that they engage in such activities and forget to use mobile phones. My nephews were also like them but then I advise my sister to keep them away from mobile phones otherwise they will be addicted to them. So, now she bought different toys and learning materials that they keep playing with them. I know parents get busy with their work but they should spend some time with kids so that they create a strong bonding with them.