yes of course - are you coming over this way at all? the paints are in strips of 5 like you get in paint it by numbers kits - I got loads of them when our local craft bank shut. get collecting jam jars and get your friends to do so too - or ask attendees to bring one with them. do you have lots of paintbrushes - or could you borrow form school? you'd need quite fine ones to go in the pots.
paint also works on tiles if you have any spare ones knocking around - we've made teapot or pot stands by painting on plain tiles.
make a load of salt dough - cut out with christmas bisc cutters, make hole in before baking. these can then be painted and glittered - cheap to do in bulk but effective, and suits a range of ages.
bulk buy very cheap photo frames (3 for £1 in Ikea) get kids to decorate frames. do a group shot at the party, take laptop and printer and print out copies at party - put photo in frame to take home as memento.