its 5 five part fully printable fidget toy.

superglue is used to stick the parts together. Don't use too much glue, the fidget will get stuck if you do.

I printed the top of the inner part with 100% infill.

This can be done in Cura by:

1. creating a support blocker on the front

2. making it larger to increase the volume

3. in "per model settings" → “modify settings for overlaps” → "select setting" tick on infill density

4. set infill density to 99%

you can now check if it worked by going to the preview: