I made this model so I could DIY graduation cards this year. It's a stencil that says "Congrats!" If you 3D print, feel free to use it too! The model is public domain for your use: https://makerworld.com/en/models/2890911-congrats-stencil#profileId-3230077
Available on MakerWorld: https://makerworld.com/en/models/1960502-circle-mosaic-rainbow-puzzle Public domain for your use. If you are selling online, I would appreciate if you mention that you got the model from me, Amanda Roos. Enjoy! Fits snuggly in 3x3 inch bags!