I'd like to think that this cake really does have lots and lots of separate little layers, each one wrapped in its own pretty tissue paper just a little different than the one below it.
When I was a kid my mom had a cookbook all about how to make creative cakes with nothing but a round cake pan, a bundt pan and a square pan. She made caterpillars and castles and Snoopy and all sorts of amazing creations but I don't think I ever saw a donut. It's so simple it just slipped under the radar.
I always thought that large Lego cakes looked so fussy with all the cupcake bumps that you have to frost separately and all that. This is an ingenious solution with round candies! Let's just hope Jackson is old enough to not smash all the bits together to try and build something.