Built for Fast Finishing
A uniform page is mostly open space. Two large panels, a name, a number, and some trim. That makes these among the quickest sheets to complete, which matters for younger kids who lose interest halfway through a busy drawing. Someone can finish a whole kit in one sitting and feel like they made something complete.
The Number Is the Trick
Every uniform carries a player number, and how you handle it decides whether the page works. Left white with the outline dark, it reads from across a room. Filled in the same color as the shirt, it vanishes. Kids figure this out fast, usually after one page where the number disappeared, and it is a small useful lesson about contrast.
A Kit of Your Own
Nothing forces you to use the real colors. Plenty of kids color a uniform in the colors of the team they actually play for, or invent a combination that does not exist in the league. The outlines take any palette, and printing several of the same sheet lets you try three versions and keep the best one.