Sorry, can't get a picture, I only use my phone and the camera is broken.
Anyway, I use aquarium sand. It cleans easy, grows very little bacteria and algea, and the frog seems very happy about the softness underfoot. I use to have river stones but they were a pain, grew algea quickly, the frog would get stressed from the noise every time I went to take them out to clean, and I read a post in the budgetts frogs about a frog eating rocks, I don't think a little sand poses much of an impaction risk.
The divider is the toughest part. I found a coated piece of metal that I bent into a ramp and siliconed it in place, but I got a small leak and the underside has started to rust. I need to come up with something else. My frog also likes to use the dry part of the ramp as a platform to slide up and catch food, kind of crocodile catching wildebeest style.