In the final stages, you need Logo Parts to open the back door in the Vault.
To activate the projector in the Puppet Shop, you need the Mechanical Wing , the Parrot Head , and the Doll Part . File: Puppet.Show.Souls.of.the.Innocent.CE.zip ...
In Chapter 1 (Girl's Bedroom), you must find a mechanical doll part on a headless doll on the bed. In the final stages, you need Logo Parts