My ds will not walk outside at all. He is fine being carried or in the buggy but as soon as you put him down he throws himself to the floor and cries. They have started taking him outside at nursery again now the weather is better and he just cries and tries to get back in. Has anyone else been through this? Any tips? He is very big for his age, 20 months but he's 3 year old size/weight so carrying him is becoming increasingly difficult.