One of the downsides to Batman's resurgence in popularity over the last few years has been the lack of material suitable for younger audience members, something i really hadn't thought about until my four year old godson suddenly became a massive Batfan.
While both of Christopher Nolan's films have been excellent and Paul Dini's Batman: The Animated Series is probably the best serial interpretation of Batman that has ever been produced, neither is particularly suitable for a four year old.
Luckily the people at Warners must have forseen this becoming an issue and solved it by making this wonderful series. The Batman here is akin to the silver age Batman, as shown by his Blue cape and smile. Made with as much love and passion as the previously mentioned animated series, this show also takes advantage of the wider DC universe, and often leaves the dark and gloomy confines of Gotham City and follows Batman from the depths of the Atlantic Ocean to the far reaches of Outer Space.
This show is so well made that they have even managed to make the previously maligned Aquaman into one of the better characters by recasting him as a happy and boastful king, often regaling his guests with the tales of his many adventures (whether they want to hear them or not).
If you are looking for the dark, brooding Batman, this series probably isn't for you, but if you are a parent looking for a Batman cartoon that you can happily show to your children, this is that cartoon. It's well made, well animated, smartly written and, most importantly, just plain fun.