I haven't made fire logs but I've made fire starters using sawdust or wood shavings which you can buy at pet stores; the type used in rodent cages. (Look for unscented ones.) I put the shavings or sawdust in empty cardboard egg cartons, (not styrofoam,) then melt old candle stubs in an empty coffee can. Pour the melted wax over the shavings until they can't absorb any more, then allow them to cool. Break the egg carton apart into 12 sections and you have 12 little fire starters. Great for starting bonfires or fires at the beach in fire rings. Just tuck a few in and amongst the kindling wood and light them. It's the easiest way I have found to start a fire.