"Το παιδί θα δει την επόμενη διαφήμιση."
Translation:The child will see the next advertisement.
To look at, to see and to watch are all different to one another and cannot be used interchangeably. Depending on what meaning you want to convey you need to choose one of the three. http://dictionary.cambridge.org/grammar/british-grammar/look-at-see-or-watch