Simple and Easy DIY Travel Kits for Kids. Great for vacations - road trips, plane trips, etc - but also great for entertaining kids in waiting rooms and restaurants. From Fun at Home with Kids Traveling with Kids, Traveling tips, Traveling
DIY Portable LEGO Kit with Free Printable Activity Cards. I like this for school, older kids can have activity cards to create planets/atoms/molecules/fractions, younger ones can practice fine motor skills.