The book I've referred to for this project is The Mural Book: A Practical Guide for Educators by Janet Braun-Reinitz and Rochelle Shicoff. The authors recommend using Golden Paints. When I found out that Golden acrylics cost about $25 for an 8 oz. tube I nearly passed a stone. Thank God there was a more affordable option for me at Michael's. I ended up getting Liquitex's students-grade Basics acrylics. They were very creamy and covered a large area. I ended up buying double of what I actually needed. I'd recommend them to anyone. Especially, since they were only $8.99 for an 8 oz. tube. Here's one of the seniors up on the ladder.
So far so good. Next, the kids outline the entire image with black.