I have a brother who is 10. He isn't as bad as your siblings are. Well, besides him repeating everything that he sees on the Internet even though he is 2 months late.
"Did you know Ascension is going to be in black and white?!!?!?111??"
"Boy you're slow" I always say.
THE NEXT DAY
"Did you know Ascension is being released tomorrow?!!?!?!?!!11"
"You already asked me that you dumbforget."