If a picture tells a thousand words, how many does a video tell? One of the great things about the internet is that you can quickly find video to help illustrate almost anything you want. The next time your little ones ask you something, such as "how many legs does a butterfly have?", "how high does a kangaroo jump?" or "how fast does lava flow?" , instead of just spouting an answer, turn to the internet and find some video that illustrates the answer.
YouTube is probably the best known site for videos in the world. You will find short clips illustrating almost any point you care to imagine. Besides YouTube though, there are many other really good sites with high quality video that can be used for educational purposes. Here are a few video archives that you can search and access without having to register:-
If you want to use video in your setting, be careful not to breach any copyright rules. Don't copy the video onto your own computer or download to place on your onw website, make sure that you simply link to videos or embed them in ways that are encouraged and allowed.
Why not set yourself an ongoing project to discover a topic in detail, looking for illustrative video to help you learn along the way?