Kate,
Other books that I use in STEAM and engineering K-12 outreach are:
The Most Magnificent Thing by Ashley Spires (2014)
Engineering Elephants! by Emily Hunt & Michelle Pantoya (2010)
Engineering the ABCs: How Engineers Shape Our World by Patty O'Brien Novak (2009)
Rocks, Jeans and Busy Machines: An Engineering Kids Storybook by Alane Rivera (2010)
What's Engineering? Color & Discover! coloring book by startEngineering.com (2015)
Dream Invent Create: Engineer the World by startengineering.com
Randy Riley's Really Big Hit by Chris Van Dusen (2012) (I love Chris Van Dusen's illustrations!)
If I Built a Car by Chris Van Dusen  (2007)
If I Built a House by Chris Van Dusen (2012)
How Do You Lift a Lion? by Robert Wells
Leo Cockroach Toy Tester by Kevin O'Malley (1999)
Scoop, Seesaw & Raise - A Book About Levers by Michael Dahl (2006)
Pull, Life & Lower - A Book About Pulleys by Michael Dahl (2006)
Roll, Slope & Slide - A Book About Ramps by Michael Dahl (2006)
I will email you the rest.