These are Christmas tree ornaments that can be opened to hold a gift.
If you want to print them with numbers, to make them an advent calendar, use the 24 Secrets File. I had to separate them both because of the file size on the upload

The mechanism is a new invention by me, inspired by the genius animations of Javad Taba.

You need

6 Connectors
1 Cap
Pieces 1–6

Print Settings

Standard. No supports needed. If your prints are sagging, enable supports.

Assembly

I made an assembly Video: Watch the video

Troubleshooting

Only read this if you are having one of the following issues.

Connectors pop out when closing

Print one of the longer connectors provided in the troubleshooting files.

Cap dosnt fit

Make sure the Pieces are actually ordered clockwise. If thats the case print a bigger or smaller cap depending on whats the problem.

Connectors are hard do push in

Print one of the smaller connectors in the troubleshooing folder.