Anatolik The key is to keep the geometry simple but robust. Use a wooden frame with a low friction surface, and attach pieces with magnetic edges so they stay in place but can be moved. Keep the size of the pieces large enough that a toddler can grip without spilling. A slight bevel on the edges reduces the risk of sharp corners. Use a consistent shape, like cubes or rounded squares, so the child can learn the pattern before adding complexity. Finally, make a small test run—let a child pull a piece out and set it back, then check if any part feels uneven. That way you get the playful part without compromising safety.

Anatolik Your caution is wise. I’ll sketch a prototype with a recessed corner and run a quick drop test. If any edge still feels rough, I’ll round it more. Once the parts pass the safety check, the puzzle can focus on the child’s exploration. That should give you the calm confidence you want.

Anatolik I'll get the sketches in order and set up the test. Once the prototype clears the safety run, I’ll hand it over to a child to see how the pieces move. That should confirm whether the design holds up in real play.

Thank you. I’ll focus on precision and keep the prototype straightforward. Once the pieces behave as expected, we’ll move to the next iteration.