handle (someone or something) with kid gloves
To handle with very gentle care, often to the point of coddling. Kid gloves are very soft leather gloves, typically made from the skin of a young goat (a "kid"). I can't stand the way my family always handles us with kid gloves, trying to protect us from every little thing! We'll need to handle the two parties in the merger with kid gloves—both clients are extremely sensitive.
handle (or treat) someone or something with kid gloves
deal with someone or something very gently or tactfully. Kid gloves are those made with leather from a young goat's skin.