This is from a kit that came free with issue 46 of Knit Now.

From the pattern intro:

“These bootees are knitted flat from the sole up. The sole is worked in garter stitch, with the body worked in stocking stitch. The laces are added at the end - we recommend securing these with a generous number of stitches.”

You also need 4 stitch markers.

Sizes:

• 0-3 months
• 3-6 months
• 6-12 months

You need white yarn, and a bright colour.