The GunboxThe Gunbox provides secure, quick, and controlled access to your firearms. Our mission is to keep families safe. Engineered with multiple methods to access your gun quickly, The Gunbox uses Biometric Fingerprint Scanner, Keypad, & RFiD Access features; uniquely designed to be a part of your home or office décor.
https://www.thegunbox.com/
Just know that for most of these, they are not 100% secure. You can see on youtube how to open them using picking and bypass methods.
All of my children are trained regularly on gun safety and know the rules.
One of the rules is any time they want to see a gun they can ask Mom or I to show it to them. This takes away any intrigue/curiosity about having things they can't have or see.