The file 'Frog Magnet 3D Printer Model' is (stl) file type, size is 462.4KB.
I added spaces for 4 3x1mm magnets. You will need to add a PAUSE (or M600 filament change) at the layer before the spaces are covered to add the magnets.
Here is an example of the magnets that work with this: https://www.amazon.com/TRYMAG-Magnets-Whiteboard-Billboard-Hobbies/dp/B09MQ3JXLV/ref=sr_1_1_sspa?crid=19CBW53ISMUXT&keywords=3mm%2Bmagnets&qid=1703716913&sprefix=3mm%2Bmagnets%2Caps%2C291&sr=8-1-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&th=1
Frog_Magnet.stl | 1.0MB |