DS is 19mths and very shy/sensitive in group situations. I went along to a Jumping Beans open day and he clung to me and whimpered most of the time. When I did persuade him to try one of the activities he would get scared off when other children came along, bigger OR smaller. He has only been walking a couple of months and appears intimidated by other kids. How do I work on his confidence and also get him developing his gross motor skills if he's too shy to try ?