The simplest kids' songs are sometimes the most effective -- Old McDonald's farm is not all that complex of an environment, yet it's a rare toddler or even pre-schooler who isn't somewhat amused by the song, particularly if it's delivered with gusto.
The best songs on Laurie Berkner's Buzz Buzz exemplify that truth. My all-time Berkner favorite, "Pig on Her Head," is about Berkner's family, who has a whole menagerie of animals on their noggins. (Heck, it's the sequel to "Old McDonald Had a Farm!") "I Really Love to Dance" is about a young kid who tries lots of different things but keeps coming back to dancing. Those originals are lots of fun. The covers are also performed with fun arrangements, such as the guitar, bass, piano, and kazoo used to provide a jaunty "I've Been Working on the Railroad." And her version of "There's A Little Wheel A-Turning In My Heart" uses the whole "change-one-thing-in-each-verse" to great effect.
Slightly less successful for me were longer songs that I think are more clearly designed for an interactive performance (e.g., "The Pretzel Store," "Lots of Little Pigs"). They're longer, so they're not quite as good if you (and your kids) are listening to the CD in the car. But if you're at home, and can convince your kids to act along, they'd be cute.
This is a fun, (mostly) upbeat CD and is recommended for children aged 2 to 6 years.
Berkner's CDs are available at her website, Two Tomatoes or all the finer book- and music stores.