Hoya Kerrii Variegata - Sweetheart Hoya
This is a sweet little heart-shaped succulent. Rooted leaves can remain green for years, but without a node this plant will stay about the same size and will not turn into a vining plant. Even if you do have a node, it may take a very long time to develop into a plant.
4" size will have multiple leaves. May not appear as photographed.