Here's the description:
Every monday a new challenge is posted. The participants do their "take" on the subject matter and post it. Challenges are open ended, meaning any participant can go back and draw something from a previous week. Email Jake for new challenge suggestions. (This is for BlueSky kids only.) Though anyone can participate at home. Or if you want to, post a link to your piece in the comments section.
There is some great artwork being created for these challenges. See the following images from previous postings? I recommend checking it out!