Prank War - help!!

this is great, thanks guys!
My sister is 18, if that helps Jim.

Well, if your parents wouldn't kill you I saw an amazing trick on tv a while back which we've tried at a party since and really rocks... you may need to hit a lab at school or get the sodium Iodide from a supplier but hydrogen peroxide isn't so hard to come by.
you put quite a lot of sodium Iodide in the bowl of a toilet and mix in something brown and horrible looking (we used oxo powder) and put some toilet paper down on top of it... this is actually quite an important part as you really don’t want anything really disgusting being mixed up in this!!!

Now put a fair whack of the Hydrogen peroxide in the cistern (I don't know if that's what you guys call it… the box that holds the water that’s released into the bowl when you flush) and run the funk away…

When your target goes in and flushes the toilet after seeing the brown concoction you put in the bowl the two compounds will mix and the room will pretty quickly fill with a serious amount of foam… the more of each substance you use the more pronounced the effects will be… very, very funny… but don’t say I didn’t warn you if you get chucked out the house

lol... not sure how my parents would react to that, but I might just have to try it...

If you're feeling particularly vicious, you might try putting plastic wrap over the toilet bowl. Hiding plastic snakes in another's bed/dresser drawers can be quite amusing, thought that seems old enough that if this tradition has been going on for a while, you've probably done that.

Adrian

You could put a bit of hair dye in her shampoo, that would be funny, lol.

did that last year, lol. The green was nice though...

Just for an update, I am winning by 2, so hopefully I can keep that lead. Thanks for all your help again guys!

What have you done so far then?