Hi sandy it was me, my mum brought come coloured cones from Lakeland last year and they burn blue and look really effective, but at i think ove £9 for 30 its a little expnsive!!
I have found a recipe on google using different chemicals in water, so will have a go and let you know.
You have to be really careful with the kids Sandy, even on the Lakeland box it is quite clear that these are poisonous. and i am not chemist but reading the chemical list on Google they could be a little unpleaesant, although as long as you get the kids to use tongs it will be all ok.
We got married at Christmas as well, was a great timne of year to do it.