Do better at hiding spare keys
It’s not generally a good idea to have spare keys lying around. The most commonly searched places for spare keys are under doormats, under flower pots, on top of door frames, inside of shoes, and even in your front yard garden.
If you absolutely need to make spare keys, it’d be better to distribute them directly to the people who need them. Teach your kids about the importance of not losing spare keys. If one key goes missing, you’ll need to change the lock entirely and make more spares. It’s inconvenient, but it’s a lot less risky than having your missing keys land in the wrong hands.