hours a day. a tough recommendation for parents who believe their children are actually learning from these digital books and interactive games. even if a child is learning from an ebook or swiping a pad, there s probably some learning going on. i don t think any of us can doubt that. reporter: but according to toga klein, author of how toddlers thrive, it s those precious moments cuddled around a book that are the building blocks to a child s learning development. the other theme that emerged from this study to me is the idea of never use your ipad as a baby sitter. it s a slippery slope. you start to give your child your ipad or phone and then it becomes a pacifier for them. reporter: juju chang, abc news, new york. that s a great way to put it. it becomes a pacifier. you just give it to the child. sorry. they are disconnected. what. no, i agree with you.