This was one of the reasons I wasn't keen on our house and I really want to tackle it before the summer arrives.
We have a split lawn but essentially both parts are raised and are approximately 2 feet higher than the patio. The walls are made of brick and are not immediately obvious to a toddler racing around as they are level with the grass (if that makes sense?!).
I can't decide whether we should put a small fence around the lawns or try to put some sort of cushioned playground-type surface down on the paths & patios.