i always wanted to put crickets all over the school... library, vents, empty lockers, grabage cans. Its not a senior prank, but more of a fun experiment.
*Put a mattress in the school pool, not really original but it would look really cool if you could pull it off.
*Put cellophane over all the toliets in the school... props if you can pull it off, although kids would spread it around thats thers cellophane on the shitters pretty quickly.
*Lube all over the hallways, but then your liable for injuries and what not.
*Superglue all the locks is always a good one, but your fucked if they catch you.
*The traditional cow on the top floor of your school prank, havent seen it pulled off EVER, just heard about it. Problem is getting the fucking cow.
*Dixie cups full of water covering the entire first floor. Have no idea how you could finish it in time but would be amazing.
*Road kill in the vents, wouldnt get much peer approval but would make me laugh.
***Do something to fuck with faculuty, those are the best. Superglue everything down thats on a desk or table top for example. Block off the faculuty parking lot with something maybe. Anything to fuck with them.