Why would Daze Products purposefully implement a prohibitive feature like this? According to the company's press release, the design "[teaches] kids how to take responsibility for their personal belongings."
The locking mechanism helps prevent children from doing whatever they seem to always be doing to lose their games, by forcing the little brats to keep their cartridges organized and accounted for.
Daze Products has the Game Chamber available in three different colors at its site -- silver, blue, and pink -- selling them for $14.95 each. Rotate and locate the embedded video demonstration past the post break.
[Via Press Release]