nanej, i did this with one of my 3 prone to tantrums and refusals. Going to school without a coat when the temperature was freezing, she didn't do it twice. I think it is a case of picking your battles also. If they want to do something that isn't a danger to themselves, let them do it. They will soon learn that being in their PJs in the supermarket isn't that cool!
My grand son nearly 3 had a few weeks of demands and tantrums behavior, and my son, his uncle, who has no experience of young children found the perfect way to handle it: showing sympathy and agreeing.
I don't want to put my shoes on says GS
No, I know, it's a right pain says son, I don't like it either
and by the time he finished talking, the shoes were on!
Don't know if it would work for everyone, but I saw this approach of my son working when none of us could do anything with GS and were at our wits end !
Being asked for an honest opinion
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