Hi. I hope you are all keeping well. I need some advice. I have a 16 month old daughter who tenses and stiffens when she is in her high chair, carseat and pushchair. I'm wondering has anyone else experienced this. It is definitely going on since she was about 10 months. She isn't walking yet as she bums around but were getting there. I'm just concerned that this maybe something of concern. Would love any advice.