> There's nothing suburban parents like me want more than an indoor play space for my kid (for extremely hot or cold days)

Funny enough, a new cafe opened up a few blocks from where I live with this in mind. About half of the customer space is a play area for smallish children, and the other half is "normal" with tables and chairs... My point being that it doesn't need to be limited to toy stores or kiddie museums, even if this particular cafe boards up shop.