Touchscreen devices are no substitute for books in the early years -- Your child will grow up never knowing a world without smartphones and tablets. Already, devices in little hands are becoming the norm. But at what cost developmentally? There has been a lot of talk about the dangers of excessive smartphone use among teenagers, but very little said about the equally concerning trend towards overuse by the youngest among us. Given the explosion of touchscreen applications (apps) for toddlers and preschoolers, it may be time to have that conversation. App or lap? It’s your decision. Apps on touchscreen devices: a burgeoning market for an easy target Creators of digital learning apps and games are positively giddy with the possibilities of marketing their products to parents of young children. Exhausted parents are easy prey. But more than that, what parent can’t be convinced that these apps provide learning opportunities, or a head-start with the technology