Want the full silent dribbling game this pairs with?
The named game these fixes make quieter, with its own rules and a way to keep score together.
Read the silent dribbling challengeIn most families, it's not the ball making that noise. It's the foot.
A flat or heel-first foot landing hard on the floor, a beat before the ball's even touched properly, is usually the real culprit, and that's completely normal at this age, not a fault to correct. Below: what's causing the noise, the single biggest fix, which is about footwear and floor rather than skill and a smaller technique adjustment worth trying once that's sorted. None of this is tied to one particular game. It applies to any dribbling happening on your floor tonight, whichever game you're playing or none at all.

What's actually making the noise
Most of what gets blamed on "loud dribbling" isn't the ball bouncing or scuffing at all. It's the planted foot landing flat or heel-first on a hard floor, a beat before or after the ball's touched, and that impact is what you're really hearing indoors more than any football ever manages on its own.
A heavy plant like that happens because a young child's balance and foot control are still maturing at this age, so some heaviness of touch is developmentally normal, not a sign anything's gone wrong. Two things turn an ordinary plant into a genuinely loud one: hard-soled footwear such as trainers or boots on a hard floor like wood, laminate or tile, and a firmer or heavier ball that knocks loudly on contact. Sort either of those and most of the noise goes with it. See how Our Kickabout researches its pages.
The single biggest difference
This is the fix that makes the most difference for the least effort. Socks or soft-soled slippers instead of trainers or boots on a hard indoor floor cut most of the plant-noise immediately, because it's the sole-to-floor contact doing most of the damage, not the ball itself.
On grass or in the garden this barely matters, since the surface already absorbs it. The fix is specifically an indoor, hard-floor one, and trainers on laminate versus socks on that same floor is the most noticeable single change a family can test in one evening. Worth introducing without a fuss: "Shall we play this one in socks tonight, see if it's quieter?"

The smaller adjustment, once footwear's sorted
Once footwear and floor are dealt with, the remaining noise usually comes from how hard the ball's being struck instead of gently received. Taking the pace off the ball early with a soft, relaxed touch, rather than jabbing at it or stopping it dead, keeps both the ball-contact sound and the accompanying foot-plant lighter.
This isn't something to drill or correct mid-game. It comes with a slower, more careful pace of play, the kind that shows up naturally once a child isn't rushing to get to the next touch. There's nothing here to practise on its own, just something that tends to follow once the bigger fix is already in place.
Worth trying, not essential
A softer or foam ball knocks and bounces more quietly than a firmer one, so it's a legitimate third lever, but it's the smallest of the three and not necessary if footwear and touch are already sorted. For anyone who wants a proper look at which quiet balls and surfaces work best, that comparison lives on a page of its own rather than repeated here.
Two minutes, no equipment
Have your child dribble a few touches in trainers on the hard floor, then the same few touches in socks and just listen to the difference. It isolates footwear from technique from ball, so a family knows which fix is worth bothering with rather than changing everything at once.
This ties in neatly with the silent dribbling challenge, a way to run exactly this test, since "how long a silent streak lasts" is already a built-in way to notice which change helped.
More on quiet dribbling
This page is the "why and quick fix" page: the plain explanation of stompy feet and the three fixes ranked by how much difference they actually make. It's a different job from the full silent dribbling game itself, from a page on structuring a whole indoor practice session, and from a proper comparison of quiet balls and surfaces. See the routes below for those.
Quick answers
Usually it's the planted foot landing flat or heel-first on a hard floor, not the ball itself, and a young child's balance and foot control are still developing, so some heaviness of touch is normal at this age.
Swap trainers or boots for socks or soft-soled slippers on a hard floor. That single change usually makes the biggest difference, since it's the sole-to-floor contact causing most of the noise.
A softer or foam ball does knock and bounce more quietly, but it's the smallest of the three fixes and not essential once footwear and touch are sorted first.
Keep going
Pick the page that fits what you need next.
The named game these fixes make quieter, with its own rules and a way to keep score together.
Read the silent dribbling challengeA full session-structuring guide for indoor dribbling practice, covering how to shape five minutes of practice without any kit.
Read the no-equipment practice session guideA proper buyer's-guide comparison of quiet balls and indoor-friendly surfaces, including an honest verdict on whether you need to buy anything at all.
Compare quiet balls and surfacesTonight's five minutes
Swap trainers for socks on the hard floor tonight and just listen. That's the whole test.