Many among us can’t spell to save their life. Teaching your children to spell right from early on bodes well for their future. The Lernstift Pen is a cool tool that vibrates when you make a mistake. It could help users learn to write better. In Calligraphy Mode, the pen vibrates once when you write something wrong. In Orthography Mode the pen vibrates once for a misspelled word and twice to point out grammatical errors in a sentence. That sounds a fun pen if you ask me.