Locked In--For Freedom?

Yesterday, while at work, I received a panic call from my mom.  Lucas locked himself in our bedroom (not his bedroom, but our master bedroom). 

My parents are watching Lucas and Nathan this week.  They are leaving and going back home this weekend. While Lucas was locked in, my mom was worried sick and got so paranoid.  What if Lucas goes to the bathroom, plays in the toilet or fills the tub and drowns himself?  I don't blame my mom for thinking this because there had indeed been reports of babies drowning in the toilet, believe it or not.

Charles was on his way home.  His work is closer to home than mine.  While waiting for Charles, my folks and Nathan kept knocking but Lucas wouldn't answer.  They can hear him doing stuff inside.  He wasn't crying.  So mom and dad went out and looked through our bedroom window from the outside. They could see Lucas through a gap in the blinds.  They saw that he was opening our dressers and drawers trying to find anything interesting.  He would take stuff out of the drawers and put them back in.  He was playing with things that we didn't allow him to play with--my watch, accessories, nail-clippers, etc.

Mom and dad started knocking the windows in a desperate attempt to get his attention and have him open the door.  But he simply looked towards them, smiled, waived and said "Hi Mamu!!!", which really pissed my mom off (though I found it really cute!).  It appeared that he was enjoying it.  He was enjoying the freedom of touching and playing with anything he could get his hands on and nobody stopping him. Later, my mom saw him get on the elliptical trainer.  This was dangerous and this got my mom even more worried.

So they knocked harder and started yelling at him. Nathan helped yell, "Cousin, open!!!"  Until later, he started crying and opened the door.  Charles arrived a few minutes after.  Lucas was already out.

How it happened.
It was Lucas' nap time. Mom was trying to put him to sleep in our bedroom because my dad was putting Nathan to sleep in Lucas' room.  We can't have them both in the same room.  Otherwise, they'll never sleep. Lucas asked my mom for his comfy blanket and when my mom went out to get it, Lucas shut the door and locked it.  I wonder if he deliberately did it to lock himself in so he can be by himself.  He is at a very curious stage where he likes playing with our things more than his toys.  He has outgrown his toys--he doesn't like them anymore.  In fact, he now knows that his leap-top is not a real laptop and he prefers to play with our laptop.  I wonder if he got tired of us telling him "Don't touch Mama or Papa's things", which is what we normally say when he starts messing around with our stuff. 

Lucas has a mind of his own now, and he obviously is putting it to use.  I may not like what he did--though I found it rather cute, but part of me is happy to know that he thinks, he explores, he learns, and as long as it doesn't do him any harm, sometimes I should let him have his way.