Learn About The Intricacies Of Lock Making With The 4M Spy Science Money Safe. Build And Configure A Digital Lock To Create The Most Secure Coin Bank Ever. Learn How To Wire A Circuit And Install An Alarm Buzzer For Maximum Security. Challenge Friends To Bypass The Buzzer And Crack The Lock If They Can. Detailed Assembly Instructions Included. Recommended For Ages 8 Years And Up. Learning Skill: Creative Thinking Measurements: 2.5 Width/Inches, 9.5 Length/Inches Base Material: 100% Plastic Care: Wipe Clean Country of Origin: Imported