Sibling Detention/Suspension Prank! Must try!!
Here's a very good prank to at leased try. Go on Microsoft Office (the one that allows you to make ex. certificates, agendas, business cards, etc) and make a outline of a 'detention' paper. (you have to partially make it yourself) put a very unique signature, or a bunch of scribbles that looks like one. put beside it 'principles signature'. add a reason why he got a fake detention or whatever. then sign it again, and add two spots for a parent signature. (add other things like ex. (dear parents of Zachery giblering, we have been notified by a student that Zachery has been bullying him for quite some time. He has given us enough proof that we have decided on a suspension, or if zac's parents get involved, a simple detention for 5 days straight.) or something like that. Make it seem real. Print it out, then seal it up in an envelope. the next time someone opens up the mailbox, it'll be sitting there! They will get soooo mad!
I have tried this with my older brother, and omgawsh, he was maaaad.