This group is for anyone and you can tell the idea that YOU THOUGHT OF IT FIRST in building Lego creations in the conversation. You can add creations - only the creation with the idea that you told. You only tell the idea, and I can also tell if I know some other person who thought of the idea first, not you. The idea that is not thought first by you are not acceptable.
It doesn't mean that you can't use others idea. You CAN. But maybe you should give credit. Don't take to serious. This is just a group! This is just for mixing the real life issues with the idea here!
Tell me the idea in the conversation and also tell me in what creation you used this idea.