Toys to Annoy

Magnum 12
Rule the office with this well made rubber band gun. You can load it with up to 12 of the supplied rubber bands, and when you've lost all them, just order some more from your stationery storeman. Pisses all over the classic "rubber band on a ruler". The Magnum 12 costs £10

Popshotz
The Popshotz is an air-powered pistol that fires sucker-tipped foam arrows, or a bigger, grenade style, foam lump that is surprisingly accurate and is handy for knocking mum's ugly ornaments off shelves. The sucker tipped arrows stick to any shiny surface, with a satisfying "thwack", and travel about twenty feet. They are fired by simply squeezing the handle, and have a very good fun/pound ratio. At only £8, you could afford to buy two, and settle office disputes by duelling in the hallway.

Arm
This realistic hand and forearm will bring you countless opportunities for pranks and jolly japes - slam one in the car boot or douse the arm end in tomato sauce and stick it in the fridge. Imagine mum's face!
All this fun, for just £7.50.