How much ipad time do you think is OK for a preschooler? My boy has learnt a lot about topics that interest him such as dinosaurs through YouTube videos. I'm just thinking whether is it causing more harm than good?

With everything, there are pros and cons. My ex colleague regretted letting her iPad babysit her child as her child has to wear spectacles at the age of 5. Also, when children use the iPad, they don't interact with other people and this decreases interaction time with family members. http://www.gameskinny.com/gt6n0/the-pros-and-cons-of-letting-your-toddler-use-a-tablet