And you give the key to the treasure chest to another kid at your daycare or a kid at another daycare.
There might be a little peephole you can look through to make sure your toys and candies are still in there.
You can tell the kid with the key that they shall give one candy per day to your best friend. Every day, you can look through the peephole to make sure only one candy is taken away. You can watch as the other kid gives your friend the candy.
Once per month, the kid who has the key gets to take one candy.
If bullies want your candy, you don't have any! They might still beat you up a little, but they won't get your candy.
Uh, the 5 year old analogy is starting to fall apart. Playground rules are different.