Whereabouts in are you from? <a href=" http://www.blogdojorgearagao.com.br/tag/andre-campos/#under ">buylevitra.c.ouk</a> The brainchild of two German entrepreneurs, Lernstift is a regular pen with real ink, but inside is a special motion sensor and a small battery-powered Linux computer with a WiFi chip. Together those parts allow the pen to recognize specific movements, letter shapes and know a wide assortment of words. If it senses bad letter formation or messy handwriting, it will gently vibrate. The goal is also to make it smart enough that when you misspell a word it will vibrate as well.