Last summer I spent a couple of weeks with my younger 5 kids doing a fun lapbook about hermit crabs. It was based on the book by Eric Carle called A House for a Hermit Crab.
The lapbook can be purchased here. I liked that there were activities on the months of the year, growth (we looked up their birth weights/heights and compared to now), where they lived (address, city, state), as well as hermit crabs and oceans! We watched some fun YouTube videos about hermit crabs since we don’t have any of our own. Of course, now they want one!
Another book about hermit crabs we loved reading in the past was Pagoo by Holling.