One Piece, Kill la Kill (boobies! Yaaaaaaaaaaah), Sayonara Zetsubou Sensei (watch them in any order.. no, seriously.), Haruhi Suzumiya (or the books, they're better), Nichijou. If you're more interested in manga, Parasyte is probably the best thing Senien has ever published. It's probably not for kids.
To elaborate on my second favourite from the list that actually makes sense, Nichijou is a completely nonsensical, abstract financial failure from Studio Kyoto. It's about two girls called Yukko Aioi and Nano Shinonome. One of them is a hyperactive protein junky and the other is a robot whose left arm functions are a casarole cooker, rice cooker, machine gun, baseball bat, usb drive, and rocket, all of which were installed unknowingly by her immature 5 year old creator.
It's right in the Shonen, between the zombie porn and ecchi... wait, what?
Edit: Just thought of Arashi no Yoru ni. It's like Romeo and Juliet, but with animals. Studio Ghibli is also a pretty good option. Nichijou, Haruhi Suzumiya, One Piece, and SZS are probably good for kids.