Hi all my almost 1 year old is delayed in his gross motor. He can sit well but not transition to any other position..he also can’t weight bear at all and frog legs if made to try and stand up. Fine motor is excellent. He absolutely detests being on his tummy screams and immediately rolls back onto his back no matter what distraction I try! Has anyone got any ideas how to strengthen his core unless I physically hold him on his tummy (and he would be so distressed by that) I am getting really worried about him but gp doesn’t refer until 18 months here.