You can tell the lat supper the story about Leonardo davinciĀ 
You will see the channel Discovery Kids In which a program comes 1001 nights on Mon to Fri at 8:00 Pm
you can go to a site called where you can find a number of good stories.. and instead of stories why don't you try playing a qiuz with them? they will be delighted as well... i am telling you this as i am myself a studen and we all love quizzes...