Stack & Pack is a game I created for my 4th grade class as a way to review the topics for TCAP.
Science topics covered in Set 1 include:
Life Processes (28 Blue question cards)
Adaptations & Extinctions (20 green question cards)
Energy in Ecosystems (20 yellow question cards)
Print. Cut. Play! Also included are 16 blank cards per color so that you can individualize questions for your class' specific needs. Half ot the cards have the cute monsters. Having the various color coded cards helps you sort into 3 activity packets. I store mine in library card pockets.
The children enjoy playing these with partners in a rotation setting. After the 5 minute time allowed, I announce, "Stack & Pack!" At this time, children stack and shuffle the cards, then pack them for the next group.