The kids area includes:

• The existing playground
• An inflatable mushroom for buying gems
• Games played by spending gems
• A "bakery" where kids spend gems for snacks
  • Buttercreme Queen? 
  • School fundraiser?
  • Church fundraiser? 
• A "tavern" serving root beer and butter beer and berry beer paid for with gems
  • Rotating storyteller/bard at the tavern
  • Wood barrels dispensing drinks
  • Tiny beer mugs. 1 gem for mug, each refill is a gem
• A "shop" where the goods are purchased by trading gems
  • Shop is run by Witch of the Woods (selling candy) or a Kajit
  • Rats do the actual work and get comicly yelled at
  • Candy house in the woods style
• A bard/Storyteller
• Seating area

The idea is for parents to buy their kids a sack of gems and let them spend them as they wish. 

Gems could also be earned on quests or doing favors for the royal court

The bakery/tavern could be sponsored by a local restaurant or business. It could be a vendor opportunity for a local business, maybe Buttercreme Queen.

Rats working kids area are actual kids in 2-hour shifts

Gems- $3 per gem or 5/$10

Rat food/ feed the rats/reward the rats.  Buy rat food