My lo is a little over 10 months - a super happy, relaxed boy who's never had problems sleeping, loves his food and is just an absolute joy. For a long time, most mums hated me! But... he's not crawling, not pulling himself up, and not pushing to sitting from laying down. Honestly, if it weren't for the reactions of other mums I probably wouldn't be at all concerned, but the long line of shocked faces and mock concerned expressions I'm getting is really sowing the seeds of worry. It's probably worse because he's such a big boy (12kg and 80cm) so looks like he should be doing these things. But my questions are... to those who've been through it, when do I worry? How do I help encourage crawling, pulling up etc without being a pushy overbearing mum?