To hasten kids’ introduction to social media, a team of Finnish designers invented a block-sorting toy that also works like Twitter. It allows preverbal kids to grab colorful blocks with icons for sleeping, eating, or brushing their teeth; the kids then fit them into slots to indicate what they’re up to. The device then transmits the “status update” to light up the corresponding block-shape on the same toy in another household. Should very young children be introduced to social media this way?