Two couples are planning to take our kids to Oxford from London (10 month old twins and 9 month old boy with his 3 year old sister). Any advice on best way to travel (train v. cars)? Any thoughts on visiting the city with this group...what will be challenging with strollers? what activities will work for us v. not? what things would be especially good to try and see/do? Any pros/cons or things to consider before going would be super helpful. Thanks,