Web Rangers is a program of the National Park Service that has a lot of online activities for young people, many of which are accessible to English Language Learners. They don’t have audio, but many are interactive, with good images and simple language.

One good one, for example, is on Reading A Map. I’ve placed that link on my website under the Introduction To Maps section. But it’s worth checking out all of their other activities. It looks to me like they’ve recently redesigned the site.