Baby is 7.5 months and shows NO interest in crawling. He rolls confidently from back to front, however recently stopped rolling from front to back & just lies and screams (he’s been rolling this way since 3 months so know he can do it!!) He doesn’t enjoy tummy time & likes being on his feet, however he shows no signs of pulling himself up and won’t move his feet when standing. He sits confidently and will sit for a hours but shows no interest in the next steps :(