Artistic Help Needed-Sidewalk Painting Commission

I have been asked to paint footprints leading down a long sidewalk out front of our school to the playground. I am thinking about the technical issues of doing this project and I am wondering if any of you have some ideas or thoughts on how I can accomplish this in two full days of work. 

It will probably be close to 75-100 footprints of various sizes and colors, just me working on it. Hand painting each one seems the best option, but also very time consuming. Also, I am using a sealed acrylic paint with varnish and a gloss extender for working outdoors. 

Thoughts? Previous experience in this area? I need help! 

Thank you!

Amazing Student Art Poem

This was written today by one of my students on his portfolio cover. Amazing! Had to share it. 

Art Poem

Art is joy,
Art is sorrow,
Art is cheerful,
Art is mad,
In every way art is…beautiful.

--Clarence, 2nd Grade

Trick for Cleaning Dirty Chalk Pastels

Take uncooked white rice and toss it in a baggie with your dirty chalk pastels and give it a good shake to clean them all up! It works almost like magic. Give it a try!