Use the width when the middle is crowded, get to the byline before delivering, and pull the ball back along the ground for runners who arrive together rather than one at a time.
Play 5v5 plus keepers on a 55x40m pitch with a channel about 8m wide down each flank. Normal football with three conditions: a goal only counts if the ball travelled through a wide channel first, the delivery out of the channel must be along the ground, and at least two attackers must be inside the box when it arrives. Defenders may enter the channels, so the wide player still has to beat somebody. Play six-minute games and rotate the keeper. Remove the conditions one at a time for the final game and see which behaviours stay.
The standard wide-play game is a good one: mark a channel down each flank, insist the ball goes through it, and count a goal from a cross double. It drags a team out of the crowded middle and it rewards the delivery. There is only one problem with running it at under-11, which is that the finish it is designed to produce is illegal.
Deliberate heading is an offence at under-11 and below. A game built around timing runs to the near, middle and far post is built around an aerial ball, so at that age it is either producing free kicks or producing nothing.
The fix is not to abandon width. It is to change what comes out of the channel. Keep the ball on the floor and everything else about the practice survives intact, including the part that actually matters, which is the wide player having to beat somebody and get to the byline.
The low delivery is also simply better at this age. A cross that has to be lofted needs striking power most eleven-year-olds do not have, so it either falls short or sails over. A ball rolled back from the byline needs accuracy instead, which they can produce, and it arrives at a height they can finish.
Getting to the byline is the detail worth defending against impatience. Young wingers release as soon as they enter the channel, from a position where every defender is facing the ball and the keeper can collect. Two more seconds of carrying puts the ball behind everybody, with defenders running toward their own goal.
The two-runner condition solves a separate and very visible problem. One striker in the box is a defender's easiest afternoon. Two arriving from different angles is an actual decision, and it forces the rest of the team to get forward rather than watching the winger work.
Take the conditions off one at a time at the end. The behaviour that survives without the rule is the one that was actually learned.
Save it to your private drills, then change the animation, adjust positions, swap equipment, or drop it into a session block. Or start from a blank pitch and build your own.