There are many worthwhile organizations that support the orphaned children in Ukraine . I have listed several charities that I am personally familiar with and I encourage you to visit their sites and consider making a donation to support their efforts.

His kids too.org

This volunteer charity is funding completely by public funds and 100% of the donations are uses to provide humanitarian aid to orphans, abandoned children, the elderly and poor of the world in several countries, including Ukraine .

Life2orphans.org

This is a collaborative, secular, non-profit established by a group of caring individuals primarily to directly help orphaned children living in orphanages in Ukraine .

The Big Family Charity Foundation

This site is managed by a group of adoption facilitators who work with several orphanages. Individuals can sponsor orphans for a nominal fee and receive correspondence from the children on a regular basis.