I think children learning to cook can be such a wonderful thing. It can help build confidence make them feel good about themselves. It helped me build my ego and even start to get acceptance at school. I'd bring things to class that I'd cooked at home.
The most used piece of kit in my kitchen is my saucepan. I use it every morning to cook my porridge in. The least used piece of equipment? I'd say a food mixer. I've never used it I don't really know what they're for.