sorry for the delay! Below are the 3 things that I use. I am starting to look into a skateboard looking balance board to add to the mix. I bought each of the items below 2 years ago and they are still holding up very well.

Wobble Board

https://www.amazon.com/gp/product/B0711Y2NZZ/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Balance Disc

https://www.amazon.com/gp/product/B00DYA3FIC/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Balance Pad

https://www.amazon.com/gp/product/B07NYVPC9X/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1