This is a model of a traditional Japanese kid's toy. The Daruma doll is stacked on top of five of five pieces, and players use a small hammer and take it in turns trying to hit the bottom piece of the stack out without knocking over the whole thing.
Here's a video that probably explains it better...
All six main game parts have a vertical hole running through the middle, meaning you can display this stacked with the hammer running through the hole, holding everything in place.
Go for a decent infill with this one, you want it to weight about 30g. It's important the bottom surface is nice and smooth, give it a sand just to be safe. I'd also recommend painting the face black and red as illustrated on the render.
Print five of these! You want these weighing around 12- 15g, 30% infill was sufficient for me. Smooth top and bottom surfaces are key, you might want to give them a good bit of sanding, I'd also highly recommend painting them different colours!
hammer - head.stl
This is probably going to see a fair bit of action, so I'd again give it some good infill so it doesn't break quickly.
hammer - handle.stl
I don't recommend printing this, but including it here just in case you're crazy enough! A much better alternative would be a piece of 5mm dowel, around 160mm length.