I stocked up on paint. I went to the local craft store and bough one bottle of every color in my favorite brand of paint. I bought a huge assortment of paint brushes, a painting pallet, a paint brush caddy, a paint organizer, water buckets for cleaning the brushes and an apron.
I cut the wood, painted it and glued plastic plug covers on the back. They hid the receptacles.
Some blocks I painted
Advent Calendar with removable pieces
An Eastery Gift for a friend