Rather than buying a thing, buy an experience. Buy something that the family can do together. Buy a theater tickets, a trip, a weekend to a special place. Perhaps there is something that someone has always wanted to do, like horseback riding lessons. Buy those.
If money is tight, there are many experiences that are free or low cost. Make up tickets for a monthly game night, a special dinner for the family at home, a day at the beach or a museum. Or simply tickets for talks, long, lovely conversations without phones or texts interrupting you.
Give time. Give love. Give yourself. Happy holidays!