SnowFlake Keychain. 

To achieve multicolour prints with a classic single-colour 3D printer, use a post-processing script : "Pause at Height" in your slicer.
For this specific model (with a layer height of 0.2 mm), set the pause at layer 12. When the printer pauses, manually change the filament to a different colour and resume printing.  

• Only use PLA on PLA or PETG on PETG — don’t mix materials.