Some tinkercad resources:
Locket https://drive.google.com/file/d/0B0LlWBc4_vDkR3p0LU9mR0VkMWs/view?usp=sharing
Saving and printing https://drive.google.com/file/d/0B0LlWBc4_vDkdnFLaWVuUnFBYUE/view?usp=sharing
Sizing guide https://drive.google.com/file/d/0B0LlWBc4_vDkLWxlVzA1cU1NWVE/view?usp=sharing
Make name plate https://www.youtube.com/watch?v=V7abt0IvSXE&index=2&list=PLxnBlY3ablCkVO3_fwYIbWzs0Hb9lpfgG
Setting up an account in tinkercad https://www.youtube.com/watch?v=bf5kW6myGEs&list=PLxnBlY3ablCkVO3_fwYIbWzs0Hb9lpfgG&index=1
See lots of projects: https://www.thingiverse.com/