Synopsis: Ongoing manga by Kiyohiko Azuma (creator of Azumanga Daioh). Yotsuba is an adorable and eternally cheerful adopted girl with green hair. The manga has no plotline other than following Yotsuba around on her daily adventures to discover new things (her discovers even include things that should be familiar to children, like playground swings and air conditioners). Volumes 1 - 3 are currently available in English, with 4 and 5 shipping later this year.
Yotsuba is a five-year-old girl, and she is very curious. And very strange. She is a lot like the character GIR from Invader Zim but EVEN MORE ADORABLE. Yotsuba yells a lot, punches a goat, and is so full of wonder that you want to hug her. I think my favorite part may have been her unsolicited cicada impression - she climbs a telephone pole mid-town yelling "ZREE! ZREE!"
Though this slice-of-life manga is all ages, I really enjoyed its cuteness and look forward to reading 4 and 5 when they come out. It's a great break from other more intricate books, a palate cleanser great for summer reading.
Note: Several characters in Yotsuba&! were previously featured in a one-shot manga called Try! Try! Try! Which I'm trying to get my hands on.
Note again: "Yotsuba" is Japanese for four-leaf clover, and Yotsuba has green hair in four pigtails.