I got these ones! $25 was a low ball it seems, Lol. I def did not pay $70, lots of good options around $50. My search term was “obstacle course” but I found a bunch when I searched “kid’s stepping stones” too.

https://smile.amazon.com/Edx-Education-Step-Trail-Coordination/dp/B07S6XWLJC/

My only complaint is the balance beams don’t nest within each other like the stones do. But they’re super sturdy!