Magnetic toy fence
This design uses small & powerful magnets (Buckyballs) that can be a gastrointestinal obstruction hazard. Print at your own risk.
Something to keep the toy horses corralled in.
Print, pop in 5mm Buckyballs, snap together to make a toy corral. (I used generic 5mm spherical magnets from aliexpress - they measured exactly 5mm in my digital calipers)
I'm working on making this a customizable print, but haven't nailed down all of the parameters yet.