You bet it'd sell! You're going to need a great, scientific name, a great process and a great logo, though.

You're also going to need to be very strict - setting standards on what constitutes a good playground, so you might want to go for the overall safety aspect too. Be prepared to play hard-ball and revoke your tag if the play area gets into disrepair.

You're going to need some classy tags and window stickers for the business to display at their entrances. Small metal signage for the outside of gated play areas would be great too.

Don't just do restaurant play areas, though. Many malls have a play area as do gated communities and apartment complexes and daycare centers.

The "little guys" need a break too. So, offer classes on how individual babysitters can keep playthings clean. Then they can pay to be certified as well, proving they have some training. Be sure they take a test of some sort, both written and practical hands-on.

I love this idea and I hope you pursue it.