Baby Card Text My Brother And Sister Inlaw Sent Me Some Gifts And Small Amount Of Money For My New Baby, Should I Thank Them?

My brother and sister inlaw sent me some gifts and small amount of money for my new baby, should I thank them? - baby card text

I received a small gift and some money from my brother and his wife for my new daughter.
Should I thank you? Is it always important to thank someone for a gift and how do I do, maps, notes, called SMS (text message)?
Thank you.