Think about it...
Your great grandpa who lived centuries ago and who is still known for the great inventions he made in the past wrote you a letter!
Ali Qushji the space engineer, Al-Biruni the famous mathematician, Evliya Chelebi the traveller,
Al-Farabi the second teacher in the world, Hezarfen Ahmed Chelebi the first aircraft engineer and Ibn Khaldun the most important historian and philosopher of the world wrote you a very special letter. It is very exciting, isn't ...