Here is the official explanation of what the Activity is, which can be found on the same page where builders should share their submissions:
Are dragons not supposed to be big? But what about tiny dragons? How would they look like? Why don’t you show us!
This is part of a series on LEGO Ideas that gives little tasks for builders to get involved with – there are no prizes, they are just a way to get involved with building something quick for fun. Each challenge is intended to be something quick and fun, unlike the more in-depth building required for a competition or product idea.
The deadline for this Activity is March 17 at 10.00am CEST.
Two product ideas were recently confirmed for production, with Winnie the Pooh and Medieval Blacksmith announced for release in the theme. Those looking to win prizes may be interested in the LEGO Legacy: Heroes Unboxed competition.