Challenges ← Knowledge Base Who can participate in Challenges? Do I have to have an account to take part? How old do you have to be to participate? Why can a parent not submit an entry on behalf of a child? My entry was rejected! What do I do? Can a group submit one entry together? Can I enter a challenge multiple times? Can I use "illegal" LEGO building techniques? How do I know if my entry was submitted correctly? I see an entry that doesn't fit the rules! What do I do? Oh no, I missed the deadline for the challenge! Can I still submit it? Someone stole my work and has entered it into the challenge! What do I do? I don't own any LEGO bricks, can I still enter? Can I share my entry on social networks, Flickr, or at a convention? Will my challenge entry be a LEGO Ideas project and be considered as a new LEGO set? How does the countdown clock work when there’s less than one day left? If I submit my entry the day the challenge closes, will it be moderated in time to be judged? Do I have to purchase a LEGO set in order to take part in a challenge?