Every child’s different but it will do no harm trying to introduce it. I got one for my little boy and my first thought was to introduce it as a seat, that didn’t work, he uses it as a bag or a hat so decided to put it in the bathroom and give it another couple of months
I've introduced from a young age. Sit them on after a nap and if I see him straining to do a poo I'll sit him on if I'm quick. Have caught a couple of them and he's wee'd in the potty a few times.
We’ve started introducing it but not formally training yet. We do his nappy changes for wees standing up so we’ve introduced the potty to catch any wees he does during that and to start building the association that pee goes in there. He does sit on it too but hasn’t done anything in it whilst sitting yet. We have another one in the bathroom, my plan was to sit him on it when I’m using the toilet but he just plays with that one 🤣
I started sitting my little one on the potty in the morning whilst I go for a wee, just so she can get used to it. She got the hang of it right away and more often than not does a wee/poo in it :) x