WASHINGTON – A 2-year-old boy was caught on tape picking the lock to his sister’s room.

After his 8-year-old sister accused her brother of stealing from her room at night, parents Joann and Mike Moser told her to lock her door. The next night, her beloved stuffed unicorn was missing again.

So the Mosers set up a baby cam to see how their son was picking the lock. Turns out, he was using a pair of fingernail clippers.

“Kyle has always been one to fiddle things and try to see how things works,” Joann Moser told ABC News.

“We were impressed that he found the fingernail clippers in his room, flipped them open and used those to open the door.”

Watch the video here:

Follow @WTOP on Twitter.