Push Button Padlock
This is a different type of padlock. This one has buttons and you need to press the right ones to open the lock.
Price: 3 USD*
Does it work: Yes!
Link: http://goo.gl/z4mgt0
Music by: Dyalla, / dyallas
Song: Darling
*price may vary
(i am not trying to sell, i just want to show cool gadgets and where to buy this)