Well actually im thirteen too. And im experiencing the same problem. I sit down at my animating desk and then im like "meh..." and walk away . What I have done is take a break from legos if that including building or animating. maybe even a YEAR of a break. One time I walked away from legos and came back a few months later and could not WAIT to get animating again. But the choice is up to you.

And i dont know why this posted twice lol.

Heh, I stopped brickfilming about 8 years ago. I lost interest I guess, and a new game I started playing took most of my time (*cough* World of Warcraft *cough*), and I kinda lost the time and space to do it. But recently I got interested again, I'm 23 now I will never do any brickfilming while I'm not interested though, motivation helps

That could be a reason though. Seeing a ton of new Lego animations everyday.

Yep, I am.