I don't think it was Wee Sing, I think it was Kidsongs.

All I really remember is one of the songs was "All the Pretty Little Horses" and one about the Unicorns not getting on Noah's Arc. I think there was also a playground at night...

Sorry:( That's all I remember

I think its 'Kidsongs: Good Night, Sleep Tight' but I can't remember for sure?