Is there any way of making your boobs perky again after nursing your baby?

Plastic Surgery. Plastic surgery if you want that look without clothes. A well fitting bra if you want it while clothed.
Breast lift. Breasts go through many changes after breast feeding, with the most common being some degree of sagging and volume loss. If you are happy with the size then a breast lift would work, and there are several ways of doing that. Implants are a good choice for restoring fullness to the upper part of the breasts for a perky look. Nonsurgical approaches will unfortunately be ineffective.