Launching the Learning Career- The Critical Period of Years 0 to 3:? Although we don't expect to see a 6 month old tweeting anytime soon, there are a host of PostPC era tools emerging – from touch screen to motion sensing to 3D interfaces - that make the digital world accessible to toddlers. Parents, as well as their toddlers, should be using these tools to better understand and support their babies as they transform from a relatively helpless newborn to a fully competent walking, talking, problem-solving 3 year old. There is no more important 3 year period in anyone’s learning career. Less