Very popular with children! Makes a great gift anytime of the year too. Choose their favorite color for the car and start knitting away. Most knitters can make a pair in less than 2 days! These are double thick for warmth and wear quality, so they can take a lot of footsteps by little feet! Slippers will stretch some to fit too, but as children come in different sizes for their ages, pick the size that most fits that child. Uses worsted weight yarns, knitting needles US # 8. These are easy to knit up for children, from about 2 years to 6 1/2 years old! Make lots of these for gifts!