Congrats on the pickup. I too own a pink DS Lite, though in my case, I changed the case for a knockoff one from ebay (dark blue, left the buttons, screen frames and so on pink), which is an option if the color gets on your eyes after a while. It's not terribly difficult, you need a triwing screwdriver and steady hands, though.
I'd also recommend Puzzle Quest, I've found it the perfect kind of simple timesink for bus rides for example.