A long-standing repository for retro PC titles. They often host the files, though they may require a small fee for high-speed downloads or offer a slow free version.
This is the safest bet. Many users have uploaded ISO images (disc copies) of the original CD-ROMs. You can search their "Software" library for "Nickelodeon Jigsaw." nickelodeon-jigsaw-pc-game-free-download-full-version
Released around 2003, this PC title features digital jigsaw puzzles with characters from classic Nicktoons like SpongeBob SquarePants , The Fairly OddParents , Rugrats , and Rocket Power . It was designed with various difficulty levels and custom puzzle-making features. Where to Find It Safely A long-standing repository for retro PC titles