My son saw a picture of a similar scarf, and pointed out that I’ve never knitted him anything. “You can make that, Mom!” So I did. So can You.

Using one strand of each yarn together, cast on 40 stitches. Knit ten rows of garter stitch.
Row 1: knit across.
Row 2: knit 3, purl to last three stitches, knit 3

Continue alternating rows 1 and 2 until you get to the last seven yards of yarn. Knit 10 rows in garter stitch. Bind off, weave in loose ends. Wash and Block.