I have been very pleased in recent years that the selection and availability of gun safe options. Large vault doors and safes to small safes that can easily hidden between the studs of your walls. Hidden safes under your bed or in furniture.
I saw a nice bedside table option:
This one is from StealthVault.com. With biometric technology getting better and better it makes it easier for you and tougher on burglars to find and open them. I understand that no solution is perfect. But they can keep your kids safe.
--Creative, secure but bring your wallet!!