This is a Nick Jr. cartoon that was very popular with our kids. The music is particularly good.
5 animal friends play together with a different theme (Egypt, under-the-sea, space, cowboy, etc.) each episode. The friends take turns being the ‘good guys’ and ‘bad guys’ and the overall tone is very kind and gentle.
It ran from 2004 to 2010 with a total of 80 episodes.
You can watch for free at NickJr.com if you have a cable tv account, and it’s available on amazon’s streaming video service as well. (And they’re all on YouTube too, although you may have to hunt for them.)