This is what the different signs would best appreciate.
Aries: Write them a heart-felt thank you note or card.
Taurus: Give them a gift certificate to their favorite coffee shop or shopping store.
Gemini: Bake them something.
Leo: Ask them about their day.
Cancer: Walk them to the bus stop or home from school.
Virgo: Lend them a hand on something they are working on.
Libra: Do something nice for them.
Scorpio: Give them a hug. Yes, it can be that simple.
Sagittarius: Pick up some groceries or food and drop them off on your way home.
Capricorn: Tell them what you think they are particularly great at.
Aquarius: Write notes to leave on a pillow, a computer keyboard, or in a lunch box.
Pisces: Make a special day just for them. Plan a day for them around what they enjoy. Go with them if it’s appropriate.