Perhaps a simple text based game like hangman might be a reasonable challange. It would require use of basic control and data structures, and character matching. No graphics required, just a counter of remaining incorrect guesses.
Comment on Re: Solicitation Of Ideas For "Time Capsule" Project
ktross,
Great idea! My guess is that depending on how long the time capsule stays closed, the replies would likely include graphics and a whole lot more without increasing the LOC. Given the idea of proposing several tasks based on skill level - do you have any other ideas?