From the MoshiMonsters website:

Moshi Monsters is a free online game for kids, where they may adopt a monster and look after it. Kids care for their monster by solving puzzle games, which earn their monster virtual rewards called Rox. Kids can spend Rox on virtual items like food, furniture and other treats and toys for their monster.

For my part, I did all the character animation for the characters “Luvli” and “Furi” (left to right in the banner above) as well as a viral music video which, as of August 1st, 2011, is at 1.3 million views! Below are reels for the character animation as well as the full music video.