Assemble a double-security lock with a combination code and key to hide your most prized possessions. Then get even more advanced by using the included electronic components to build a door alarm or pressure plate to further protect from would-be intruders!
Try out even more spy projects in the crystal-clear instruction book with easy-to-find basic materials from home. Great for ages 8 & up.
- 6 plastic vault panels
- battery box