There once was a blonde who has a blind son called Timmy. On the night of March 31st she said to her son " If you pray really hard tonight then you will be able to see in the morning."
So that night timmy prays harder than ever before but wakes up the next morning still blind. He runs into his mums room screaming " I did pray, i did, but i'm still blind."
His mum gently pats him on the head and says " i know son, April fools."