I came across this Helmer drawer unit from IKEA that fit with what I was looking for. Unfortunately, it was only available in boring, basic colors. I could have chosen to spray paint it a nice green or blue color to match my therapy room, but instead, I went for a much easier, time-saving solution - washi tape!
I found two patterns of washi tape that coordinated with my therapy room color scheme. (These particular rolls are from the Scotch brand, which I found at Staples.) I cut pieces to fit each drawer, and lined them up on the front.
The great part about this tape is that it is easily removable, so when I didn't get one drawer lined up just right, it was simple to reposition it without tearing the tape or damaging the drawer. Plus, if I want to change the colors/patterns down the road, all I'll have to do is peel it off!