Cha-cha-cha! Maracas!

grabcad

The only musical instrument I can possibly master comes in two versions: one features a threaded handle and thicker 4mm walls for the rattle; the other is designed for gluing together with thinner 2.4mm rattle walls. Your experience may vary, but printing the threads proved challenging due to the need for a brim with supports, which often resulted in them being obscured by excess material. Perhaps switching to S3D software could alleviate this issue.