I did it once. Took me hours. I was about 10/12. had a lot of spare time. and im an only child. never done it since, i too can only get 2 sides now. Even if you have the instructioons it doesnt help. There was this girl in my primary school who got so frustrated with it she took all the stickers off and stuck them back on with glue to look like she had done it. she took it EVERYWHERE with her! haha, strange child.
I used to be able to do it, but my cheating was even worse, and involved removing the stickers and replacing them in the right places. Better still it screws it up for the next person who tries it. Mwu-ha-ha-ha!