All parts in the example pictures are printed with a 0.16 mm layer height. Everything should just snap together.
Base: Polymaker PolyTerra PLA - Marble White
Sign: eSUN PLA+ - Black
Numbers: Bambu Lab PLA Basic - Bambu Green (HEX#00AE42)
TIP: Also check out the other models:
Apple 2 Infinite Loop Sign
Apple 3 Infinite Loop Sign