Tim come over the other day for some real Old School gaming to finish the year. We used are collections of Britains and Timpo figures from when we were lads (which was a long time ago now) and some newer Imex and Armies on Plastic figures. My son - Max - who is 5 soon - joined in for a while - until he got bored.
http://www.allthekingsmentoysoldiers.com/documents/ATKMRules2ndEditionOnline.pdf
These rules are a fun set of toy soldier rules and we enjoyed the game. The Yankees won the battle but it was touch and go throughout.
