Build your own combination lock box and discover the mechanical secrets behind how locks work! This DIY kit teaches kids about numerical patterns, internal disc mechanisms, and code-cracking logic — all while building a functional lock box that doubles as a phone holder.
A combination lock opens not by a key, but by aligning a series of interconnected discs to a specific position. Rotating the dial turns each disc until the notched gates align — and the lock opens. Kids experience this mechanism firsthand as they build it from scratch.
Build a real working combination lock box from scratch
Doubles as a functional phone holder when complete
Learn how combination lock mechanisms work through hands-on assembly
Develops critical thinking, pattern recognition, and problem-solving skills
All parts and easy-to-follow instructions included — ages 8 and up
