A golden moment in life there, you must be super proud, my lad has done some for me to, always brings a huge smile to my face.
Makes me remember a day at the glastonbury festival, many years ago, I was fly pitching selling a few bits with friends, suddenly a small boy no more than 6 years of age turned up with a few wooden blocks next to us as sat down & promptly started arranging bits of paper under the blocks which were to hold the papers down in the wind.
So I asked what he was up to, his reply was he had drawn some pictures to sell so he could buy his dad a present from one of the stalls, priceless! obviously I bought one & prompted everyone coming to my stall about the young man & his excellent drawings, soon he had sold them all & off he went with his blocks smiling the hugest of smiles, that picture was the most valuable thing I brought back from the festival that year, kids you gotta love them.