'Toys for spiciness' [sic]?
Well, if your girlfriend is Chinese she'll be aware of the many 成人用品 (adult toy) stores across the city, usually with a clear sign above. Inside they have many toys that will um... 'spice up' your home life.

If that's not what you mean, then wander down Nanluoguxiang, or head west along Gulou Dongdajie, and you'll find many shops selling cuddly toy chilli peppers. Spicy enough for ya?

Ludovico, u r funny

Just go downtown and adult shops are everywhere...hello!

Sorry for being unclear. I thought moar about Lego's, clown dolls or water gun. It is yes to spyciness, but Chinese girlfriend of mine shy she is, so adult stores was a big no-no from beijinning.

And we hit two birds with a single stone, because she can make Lego dream house in spare time!