Pie Fractions Toy with Screw-Top Case

Update: I've added a new, chamfered version of the case body for anyone who's getting a line on the outside where the hollow begins. (I didn't notice this until I tried printing in a matte filament instead of a normal one, since it's caused by a material property. See "benchy hull line" if you're curious.) I'm calling the new one v2. I'm leaving v1 up as well because I like that look better, at least for non-matte.

I'm not sure whether this counts as a remix since I remade all the parts, but I certainly wouldn't have come up with the idea on my own (thanks t3dworld), so I'll post it as a remix.

This is a toy for learning fractions; the child can see that, for instance, two "one quarter" pieces fit in the lid-circle with a "one half" piece to take up the whole circle. I have files for everything from "one whole" to "one tenth," but you may not want to print the smallest sizes if the child is younger, as bigger pieces are more intuitive. The edges are rounded, but you still don't want to give them to a very young child. (If you're unsure, check with the parents.)

The case that holds all the pie fraction pieces has a screw top lid to keep pieces from falling out.

I made this for my nephew and niece, so the case has "Blessed and Loved," but I also included a blank version so you can add your own text in your slicer if you want.

To avoid needing support, the lid has to print on its back, so to decorate the lid I've included a thin, blank circle ("lid topper blank") that you can put words or pictures on in your slicer, print, then super glue to the lid itself. If doing this, be sure to use an opaque/dark filament for the topper so the glue doesn't show as a dark line.

The fraction pieces require a printer that can handle multiple colors at once (MMU, AMS, etc.) because they have the fraction symbol ( 1/7 ) set into one side and the word version ( one seventh ) on the opposite side. That means it's not cheap to make, though you can cut down on cost by not printing all ten fraction sizes. If you're looking for something that can be done with a printer that can print only one color at once, I recommend using t3dworld's version.

Be sure to use a color for the words different enough from the background color to make it easy to see. (Yellow on yellow-green won't work well.)

For the fraction pieces, use a large layer height to reduce waste, because it'll make no difference in this model—I used .28 layer height with a .4 nozzle. If you're printing the version of the case with words, drop to a .2 layer height. (I used a .2 nozzle for the topper, but only because I wanted sharp owl claws.)

The .3mf files include all the pieces except the blank version of the fraction pieces. If you want your fraction pieces blank, download the .stl files.

Hope you enjoy!

P.S. I'm not including the topper I made for myself because I didn't save a version without a name on it, but you can find the owl at https://www.thingiverse.com/thing:1622599 and the kitten at https://www.thingiverse.com/thing:3676722