I'm not the only one thinking about this question. "We're technologizing childhood today in a way that's unprecendented," says Yale sociologist and pediatrician Nicholas Christakis in his 2011 TED Talk.  He points to a segment of Baby Einstein where there are 7 scene changes in 20 seconds, something that's confusing to adults, but particularly confounding to babies. 

Christakis found that while television time under 3 raised the likelihood of attention problems later in life, that risk didn't exist if the young kids were watching slow-based educational programs rather than frenetic entertainment or violent progams, which have even quicker cuts and pacing than cartoons. The typical newborn brain is 333 grams in size ? and it triples during the first two years of life. That astounding brain development doesn't happen at any other point in human life ? making those early years particularly crucial.