New to all this?
First touch and target passing are two more technique basics worth working on early.
See Skill-Building GamesA pass losing power over distance is almost never about strength.
Teaching a child to kick harder for longer passes comes down to three fixable mechanics: where the standing foot lands, striking with the laces instead of the toe, and following all the way through. A short, increasing-distance drill in the garden is the fastest way to bed them in.
I spent a whole summer telling him to just kick it harder before I watched what his standing foot was doing, and realised the problem had nothing to do with effort at all.

How to teach a child to kick further
Extra effort on a bad mechanic just makes the same bad mechanic faster, not further. These three fixes, tackled in order, make the biggest difference to how far a driven pass travels.
Standing foot level with the ball, not behind it. A standing foot too far back or too far forward flattens the strike before it starts.
Strike with the laces, not the toe. A toe-punt loses both power and direction at once.
Follow all the way through. The leg keeps travelling toward the target after contact rather than stopping dead.
The longer passing technique most kids skip
A follow-through that continues toward the target instead of stopping dead the instant the foot meets the ball sends a pass further, not just harder. Most kids stop the leg the moment they feel contact, which caps the distance no matter how much force went into the swing.
A drill that grows with them
A simple increasing-distance drill scaled to a small UK garden works better than chasing distance from the first go: start three paces apart, add one pace at a time, and only move back once the technique holds, not before. Most gardens run out of usable length by around eight or nine paces, which is plenty of room for the follow-through to matter without needing a full pitch. Rushing the distance before the mechanic is solid just bakes the toe-punt habit back in at a longer range.

What to watch for
The ball starting to travel in a straight, driven line instead of skewing sideways matters more than raw distance in the early stages. Distance follows once the strike is clean; a clean strike rarely follows once a child is just trying to kick harder.
Quick answers
Almost always the standing foot is out of position or the strike is a toe-punt rather than laces contact - extra effort on a bad mechanic just makes the same bad mechanic faster, not further.
Striking through the ball with the laces and following all the way through, rather than jabbing at it with the toe and stopping the leg dead on contact.
Yes, as long as distance increases gradually and the receiving adult stays alert to the ball's pace from the very first close-range rep - it is the technique, not just the effort, that needs to improve first.
Keep going
Three places to go next, depending on what you're working on.
First touch and target passing are two more technique basics worth working on early.
See Skill-Building GamesChipping the ball over a short obstacle is a different, vertical problem.
See chipping the ballA short-range target game that builds accuracy before distance.
See the target passing gameTonight's five minutes
Ten driven passes over three paces beats fifty toe-punts at nothing.