You should probably be able to get baby lion/dragon dance heads in Chinatown closer to the day.
Also part of the tradition is fireworks, which I doubt are feasible for your setting, but children really love little "poppers".
They're basically a tiny bit of sawdust and gunpowder wrapped in a little paper, so that they're shaped like a flower (ie a ball with a stalk). When thrown they explode with a popping noise.
They come in little boxes with many inside, so I don't know if anyone would be interested in those. =-P
Make sure the kids don't try what I did though, which is unwrap many little poppers to gather the gunpowder and fill it up into a piece of tissue for a giant popper.
Regards
Mark
http://earlychildcare.wordpress.com/QUOTE (Pollyputthekettleon @ Oct 4 2009, 11:36)

We've never managed to have a live group in school (which would be fantastic!) but we have watched on the smartboard and then made our own dragon head with a long piece of red fabric behind. We arm ourselves with music an instruments and the children all get a chance to be the leader/dance/play instruments - it's really good fun :) but you do need a bit of space!