Easy Street, Step 4

I've been working away on step 4 of Bonnie's instructions when I can grab the time. Here are some of the units I've finished so far:

Of course, since I'd only finished a few units from Step 2, I was a bit behind and had to finish step 2 at the same time I was making the new units that are the new part of Step 4. But anyway, it's going well and I'm having fun!