Color your days with brainy trivia using this yearly calendar, designed with heat-sensitive boxes that keep historic facts at your fingertips.
Simply rub each black box… The heat friction created from rubbing reveals an interesting factoid that happened on that date in history.
Subscribe now to our FREE newsletter!
Subscribe NOW to 7Gadgets weekly newsletter! You will receive the weekly selection of the best gadgets!
It is FUN, it is COOL, it is 7Gadgets newsletter!
