Please note: this is glitchy. A number of people have not popped this, even after they rebuilt the object. I tried this on 3 alt accounts. Two worked, one didn't. I don't know why the one didn't, but there is clearly a glitch there. (Read more in the comments.) I don't like steering people wrong, so if I learn more I'll update this again, but this confuses me because this was the first achievement I got in the game, and wasn't expecting it to be one.
A new mechanic is the Multi-Build. When you have the option to build something (using
), move the
in a direction where you want to build your item. It will show you where the possibilities are.
For this achievement, destroy the first one you build and put it something else. This is best at the very beginning of the first level, since building on the right gives you access to a minikit, but you need to go left to advance.
One more tip: once up next to the tree that Wicket has to climb and move a pile of Legos, building to the left will give you access to your first Red Brick, the Stud Magnet (200,000 studs). Very helpful for reaching True Jedi later.