Building a fully functional Nintendo DS Lite is impossible for a school project—it requires custom silicon, proprietary firmware, and precision manufacturing. However, you can create an impressive project that demonstrates the same skills.
Clearly label any model, presentation, or game as a fan-made replica / educational project. Do not use Nintendo logos, trademarks, or copyrighted assets without permission. This protects you and respects creators.
These approaches let you showcase research, engineering, coding, or design skills—far more valuable than a non-functional plastic shell.