Parents, grandparents, aunties and uncles have all shared dozens of great pictures of young Blades fans in their beloved United kits.
Click through our fourth collection of Kids in Kits. Can you spot your child or anyone you know?
1. SUFC Kids in Kits
Jake. Photo: UGC
2. SUFC Kids in Kits
Leo Hampson. Photo: UGC
3. SUFC Kids in Kits
Ronny O'Brien, two. Photo: UGC
4. SUFC Kids in Kits
Theo Daniel Parkinson, who was two months old when this photo was taken, and two-year-old brother, Finlay Jay. Photo: UGC