I'm thinking of telling my kid brother to hide inside the old chest freezer because it's a good hiding spot.
Why would you suggest that your brother do something so dangerous?
I think it's time to test his courage.
That is so wrong. They might not know it, but it is dangerous to hide in a fridge for longer than a minute or two!
It's time to be brave and strong, if he doesn't move after a minute I'm going to let him out.
It seems funny and harmless, but if you encourage him to do something dangerous like that, he might do it at a later time when you're not there to let him out. Best to keep your play safe all the time.