Stacker Shape Sorter

I was on a play date with my 2-year-old at my friends apartment and he spent like 2 hours playing with a simmilar toy.
I come back home determined to print something simmilar… and this is a result :)

Each stack can hold up to 4 discs, and I recommend to print each set of three in different color (no AMS needed!)
I separated base from discs and put them on different plates.

This is my first ever design that I have uploaded, so every suggestion/tip how to improve is appreciated!
Designed in Blender.

Enjoy!