The penguin was created for my aunt who's a "penguin lover". The expression puzzle is not really suitable, as it could be put together by a three year old.
This build was done on a desktop cnc-machine by Stepcraft from 4 mm poplar plywood using a spiral-toothed 1.2 mm flute. After machining it needed a little sanding and simple gluing together. Then I used some spray-paint to "color" things up.
A laser cutter might be a good alternative tool to create (even) smaller versions.
You can visit Visit https://www.zenziwerken.de/en/Spielsachen/Tiere for more animals.
I used 123D Make from Autodesk which really makes it easy to create puzzles like this.