Ok so we have an Olympic themed party on Saturday, we are going as the curling team and have matching red polo shirts and multi-coloured chefs trousers (as per current games). But we need a curling stone"..........
Any ideas how I can make one?
Preferably on casters or similar so we can throw it".............

Round tupperware tub or biscuit tin with a cupboard handle screwed to the top?

Just run up the road and steal one from the Scots.

Traditional whistling kettle (filled with stones)?

Sommat like this?

http://www.ebay.co.uk/itm/Traditional-Whistling-Kettle-Home-Caravan-Stainless-Steel-2-5-GREEN-Kitchen-Hob-/380738250114?pt=UK_Campervan_Caravan_Access ories&hash=item58a5c4a582

Actually, this 'uns more curling stone-shaped
http://www.ebay.co.uk/itm/2L-Stainless-Steel-Whistling-Caravan-Camping-Kettle/291078255156?rt=nc&_trksid=p2047675.m1851&_trkparms=aid%3D22200 2%26algo%3DSIC.FIT%26ao%3D1%26asc%3D286%26meid%3D4789846994711917700%26pid%3D100005%26prg%3D1048%26rk%3D1%26rkt%3D5%26sd%3D380738250114%26