The Lacy Infinity Scarf works up quickly in one evening and can be made with any yarn you have in your stash.
https://www.myfingersfly.com/products/lacy-infinity-scarf-crochet-pattern
Materials:
Approximately 5 oz. worsted yarn
Crochet hook size J
Yarn needle
Directions:
Row 1: Ch 25, dc in 5th ch from hook (counts as dc and ch 1), *sk 1 ch, dc next ch, ch 1* repeat from *.
Row 2: Ch 4, *dc in ch-1 space, ch 1,* repeat from * across. Dc in ch-4 space.
Repeat Row 2 until scarf measures 60”.
Last row: Ch 1, turn. Sl st last row and 1st row together.
Fringe: Cut 12” lengths of yarn. Insert hook in end of row from top to bottom and pull through 3 pieces of yarn and knot.
I hope your mother enjoys wearing it as much as you'll enjoy making it!
Wishing you all a happy Mother's Day and happy crocheting!