My two sons and I have started to make a city using cereal boxes. So far I have covered them in toilet roll and used watered down PVA glue to attach the toilet roll (would have used newspaper but we don't get any and this was short notice) 
I have painted them with normal ELC ready mixed paint which seems to have worked okay but should I be using acylic paints? I have tried to add PVA glue to the ELC paint but it makes the paint turn into one big lump as if the PVA has glued all the paint together.
The City is taking on a life of it's own, I have requests for a library and a prison
(Playmobil motorcycle cop will be busy) so I want something that will last a while at least.
My son also made an incredible Mexican mask in school using half a 4 pint milk bottle, he says they used powdered paint. Would this have been mixed with water or something else.
Any help would be greatly appreciated. I did do a search and came across Dingle's Hoola Hoop Giraffe here which made me feel very inferior
but inspired!