I built my own staff to walk on don't have a pic now to show, but it's very easy thing to do. Main excercise is just walking bare feet on it a trieng as many movements as possible.
Other exercises were just for foot, will try to find some other link and post under this 🤙😉
https://instagram.com/thefootcollective.aus?igshid=MzRlODBiNWFlZA==