My baby is 5 months and can sit unaided in a high chair, why does Ronnie have to be propped up at 7 months?!
I know babies do develop differently but my baby has also been rolling properly since 4 months and can now push/pull himself around. I reckon he will be crawling properly by the end of this week. He is two months younger than Ronnie.
I spend a lot of time playing and encouraging him to do all of these things, just leaving a baby on a mat/in a bouncer surely isn’t going to help their development