Stacking is the best game about mind control, child labor and Russian Nesting Dolls you will ever be able to find.
In it you play as Charlie, the youngest and littlest child of a family of chimney sweeps. Your family is kidnapped, so you head out to find them, possessing other dolls and using their abilities to solve puzzles and proceed. The storyline is a classic naturally, but it's the premise of the game that really stands out, and Stacking has a lot of fun with its premise. You have a lot of abilities to choose from, accessed by literally jumping into another character's hollow body, and the solutions to the puzzles are clever and entertaining. While the humor of the game sometimes swings towards the puerile, there's a little something for everyone.
There's limited voice-acting in the game- cutscenes are done in a 'silent movie' type style, complete with rolling projector film. The art is bright and distinct, and like the gameplay, toys with its character model's limitations. The characters move like you'd expect a Russian nesting doll to move, if that's something you've given much thought or worry towards.
This is a great game for achievement hunters as well- the achievements are tied into completing each level to 100%, and are sensible and fun to finish.