Whats so good abt little big planet?

May be...

i have no idea what it even is

You build your own level to an extent that you could never build your own level ever before. And you can download the millions of other levels other people have made. The game basically has unlimited replay value. It's supposed to look kiddish, you are emo if you can't take a break from bloody death games every once in a while.

google it or youtube it. it looks really interesting. you can build your own custom levels and share them online. it looks pretty cool.

a puzzler game with sackboy and customization search it on youtube for a better idea

You need to youtube it up man. Watch a couple videos. Then it might click with you. (And its actually LittleBigPlanet)

i was thinking same thing it looks childish