A box is left outside of Martha Jones's flat, with a note:
Happy Birthday, Martha.
Hope this year is a good one.
Love,
-D
A small perfume bottle that doesn't hold liquid, but rather sweetly-scented Venusian air. It molds to the wearer's DNA and gives the smell that best reflects their mood.
These earrings glitter beautifully in the moonlight with stones that are clearly otherworldly, though the Doctor can't be bothered to remember which world they came from.