But he can help...take him with you in a back pack. At each door ring the bell and when someone comes out, put a brochure in his hand and let him hand it to the potential customer. Or perhaps hand them a gladiolis bulb.
"What a cute baby! and so forth."
"He is my new partner. I work hard. Just trying to set a good example for the little bugger."
If you are going to the trouble of walking to each house--you might as well ring the bell and try to make a sale. With a little practice you should be able to sell about one in ten.
Keep some diapers on hand.