Ah, the elusive goal of trying to make math fun. You’re sat at the kitchen table, trying to explain how 57+35 is not 3203, getting pretty close to banging your head against the wall, while your lovely child is wishing they were anywhere but here.
Why not turn your steps into a giant calculator? You can jump up and down, have fun, and do sums at the same time. With the added bonus of burning off energy (hopefully leading to a good night’s sleep).