She takes that as her cue to start counting, which she does with all her childish patience--that is to say, slowly at first but getting faster as she goes.

"Ready or not, here I come!" Her voice is loud but more carrying than shouting, and she sounds excited. This will be an excellent game.

But instead of hurrying off, she takes her time looking around and considering. A whole new set of hiding places requires she be thoughtful. He might have gone up a tree, or he might be among the ferns behind a rock. She doesn't want to resort to help, not if she can help it.

This might take a while.