Baby blocks with safety holes

Baby block shapes for shape-hole buckets.
The middle hole is for safety, in case a baby swallows it- air can still flow through.

Sizes are measured on a bucket I had in my home (un-branded) so I assume these are the right sizes,
One one hand- not small enough to swallow, on the other hand- size fits babies hands.

This object was made in Tinkercad. Edit it online https://www.tinkercad.com/things/2YUzImePVsK