Thing Explainer by Randall Munroe
https://www.gatesnotes.com/Books/Thing-Explainer
Just the book we have been waiting for and it is even recommended by Bill Gates! Things easily explained so that the rest of us can better understand certain complicated concepts and how things work.
Hands on Standards: Science
https://callowayhouse.com/hands-on-standards-science-grades-4-5/
Photo-illustrated hands-on science activities. “Lessons move from building background knowledge to hands-on inquiry to assessment.” These fun activities can be used for out-of-school learning in the library setting. Made easy to follow and facilitate to youth in grades 4-5 (other grade levels available).