For a sweet splurge take the kids to Serendipity 3. The cozy cafe and emporium has a reputation for celebrity-spotting and boast’s the Guiness Book of World Records’ most expensive dessert on earth, the “Golden Opulence Sundae,” served in a baccarat crystal goblet with an 18-karat gold spoon. It’s a great PR stunt and has the effect of making the more popular $8.50 Frozen Hot Chocolate will seem like a steal in comparison.