This is just from me - someone who will probably never have children of my own either - I say you should knit what you want. If you are drawn to baby yarns and the baby kimono, then knit it. If you don't know anyone to give it to, you can always take all your goodies to a local hospital or orphanage and give it to babies or children that have no one else. There are tons of people out there who have no one in their lives and would appreciate something homemade from someone. Spread the knitting love!
Plus - you never know where life will lead you - who will come in your life that may touch you and you want to give a gift that will touch their heart.