Fun 20 question hunt. One for school one for public library. Includes a quick write about what they already know. Has questions that could lead to great discussion, or could be done in one library period. (about 30 minutes)
I loved scavenger hunts as a kid, I hope your kids do too. enjoy
Independent reading level 3rd grade.
I would also do the one at school and send the other one home to make for a nice experienced based comparative writing piece. but that's just me.