Pulls and diapers are the SAME thing. Not useful at all for potty training. At home let him go naked until you both figure out the senses (& signals) for when he has to potty. Buy a little potty and stick it wherever you can contain him (living room, play room) wherever he’ll sit for a few mins at a time. Read books on the potty or sing songs. When he goes in the potty you celebrate like CRAZY to get the point across that that is the behavior you want. My son wasn’t talking when we started (22 months) but learned to say “pee” within a few days and “poo” within a week or two.
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