Hands-On History Tools for Multiple-Learner Families

My kids can share, but often we choose to allow the kids to work on a hands-on project while I read. Having everything they need right there and not having to wait for a sibling to finish with the glue is a huge blessing because it reduces interruptions and opportunities for bickering. I want them to work on manners, just not while I am trying to read Johnny Tremain!