Ds is 19 1/2 months and wants to walk everywhere bu does the usual toddler thing of going the opposite direction you want him to go in or wanting a carry (difficult as I have a 5 week old in a sling) but throwing a fit if you try and get him in the buggy. Is he too little for a buggy board? I wondered if that might help if dd was in the buggy and he rode on the back. Thanks....