Art Wall Part 1

I am working on our Art Wall to display the kids' artwork.  In our old place, I had some of the artwork from Ashleigh and Noah framed in our dining room.  I loved seeing that every day.  We have been here for 4 years and it is time to bring back some of their artwork.  The plan is to have all the painted frames to be up the stairs to the second floor.  

Here is some of what I painted so far:

I still need to do a coat or 2 for the pink, dark gray, and red.

I have been buying frames from yard sales and our Goodwill stores.  The one Goodwill store is great for picture frames.  I want to get some larger ones than I have pictured above.  

My plan is to have all the frames different colors.  What colors should I pick next?  

Melissa