Well, the gremlins just wanted to try some of your cookies, that's why they took your stuff! I told them that if they were nice and gave it back and didn't steal anymore that you would give them some cookies too. And they did give it back, so obviously they're telling the truth. You'll make cookies for them too, won't you?

[It's a fair solution to him, so he figures it will be to the Station Master too!]