My 7 year old son Christopher was studying Isambard Kingdom Brunel as part of his school topic on victorians.
Your bridge plans were ideal to show him how some bridges are constructed. I have attached a photo. Although I think the plans were to complex for him at age 7, he did have lots of fun building it with his grandad. His teacher was so impressed with the completed bridge she asked to keep it at the school for the term!
Best Wishes
