Crash Of The Titans

Like General E Quick said, you can just progress through the game and get it way before you're done, but there's another way.

When you get to the blue portal in level 1 for the mojo challenge, you can just keep replaying it and smash the 7 crates over and over again from the level menu. This should about 15 times.

i found that the best level toget this achievement was level 4