Cuboctahedron

Print its vertices and use toothpicks to assemble it !

⚠ Warning:
The toothpicks I use have a 1.6 mm diameter, so the connectors may not fit yours perfectly. To avoid any issues, I recommend printing the last plate first, as it contains 5 different connector sizes. This will allow you to select the one that best fits your toothpicks. They should insert with slight resistance to stay securely in place without falling out.