The Smithsonian just announced a new site called Smithsonian Kids.
Here’s how they describe it:
A one-stop-shop for young learners and their teachers and caregivers. We provide Smithsonian programs and at-home resources for kids age birth to eight, offer guidance on how to locate more from individual museums, and share ideas for making museums accessible and inviting to young children.
We bring the Smithsonian to you! Smithsonian Kids digital programs, lessons, and activities are accessible anytime, anywhere. Inspired by museum objects, we create digital experiences and lessons with extensions for hands-on learning. We share recorded Storytimes and other educational videos, as well as recurring virtual programs such as the National Postal Museum’s Virtual Story Time and the National Zoo’s Get a Head Start with the Smithsonian series.