There are so many useless boxes out there and the one that I liked was built from a wood. I decided use key design from https://www.instructables.com/Useless-Box-4/ but print it with my 3D printer. The Box made from PLA and imitating wood , I used https://www.thingiverse.com/thing:1329370 changed it to fit the size and changed the cover to be flat. Hinges from https://www.thingiverse.com/thing:2187167 , again, resized and made small changes so it will fit the box and be almost without friction as the door need to fall back.There are extra holes incase you want to use bigger hinges. I did not design holes for the Arduino connections and for locker , this should be done after deciding what switches and Arduino type to use. I had troubles to find the right switch after the motor failed time and time again to introduce enough power to switch it off. In my case, I needed to extend the distance of the switch away from box, this part is also included. The electronic diagram should be clear, and the Arduino code is based on https://www.instructables.com/How-to-build-another-useless-machine-easy-to-make-/ I also made a cover for the Arduino board but did not use it at the end to leave the board lights flushing on the puppet face. It can be good to protect the board. It took me time to find the right dog puppet and with regret needed to make some surgeries to it :)
Can be watched here https://youtu.be/7qZnUHORWCE

Enjoy !

Parts : • 8 M3 bolts and nuts • 2 x Futaba S3003 servos • hot glue • power bank • ON/OFF switch (you can use ON/ON connect only 2 ports) • Arduino UNO + Code • 10K resistor • wires