I'm a lurker but couldn't help but reply to this one. I haven't coached for a while so I'm not sure if it will work with the age group. But it has worked with u10s if I remember correctly. I worry this might be too boring for U8s and you might just keep doing dribble tag and having fun with the ball. Dribbling / comfort with the ball and fun / love for the game are by far the most important things for that age group. But in case it helps here's a progression that seems to work.
Getting the form, just the leg and the ball:
Kids on their butts practicing the form, just lightly striking the ball without it leaving their hands. High quality demonstration by the coach. Coaching points are the leg stays fixed, swings at the hip only, leg bent, strike on the laces, no spin, etc.
Kids on their butts kick it out of their hands, try for no spin. Demonstration by the kids who are good at it (have them compete to demonstrate). Contest to see who can do it the most consecutive times catching it without moving their butt to catch it. Also gets funny with the kids toppling over trying to catch it.
Kids on their feet kicking it into the air, try for no spin. Demonstrations and repeat.
If they're doing well, have them try to do it twice in a row, no spin.
Kicking off the ground.
Then kicking in pairs. Try to get it in the air to their partner. Set up some cones so it can be a reasonable difference. Good ones demonstrate. Individual coaching from you and your assistant for the kids who aren't getting it. This will be sloppy but gets a lot of practice.
Make that a contest. Who can get the most consecutive in the air to their partner.
Finally two teams to goal to try to hit the net on the fly. First to 10, etc.
Might take a few sessions to get to the kicking it off the ground if you're spending a lot of your practice time on unstructured play and have limited technical time.
Don't worry about weak foot to start, layer that in after most of them get it with the strong foot. Being comfortable with the form striking the ball out of the air and compounding in that is more important than being good at kicking it off the ground. That can come with time.
They won't get it at first but if they like soccer and practice at home they should develop. You can announce contests for next week to see who can improve the most, get the most consecutive no spin juggles, etc.
Getting the form, just the leg and the ball:
Kids on their butts practicing the form, just lightly striking the ball without it leaving their hands. High quality demonstration by the coach. Coaching points are the leg stays fixed, swings at the hip only, leg bent, strike on the laces, no spin, etc.
Kids on their butts kick it out of their hands, try for no spin. Demonstration by the kids who are good at it (have them compete to demonstrate). Contest to see who can do it the most consecutive times catching it without moving their butt to catch it. Also gets funny with the kids toppling over trying to catch it.
Kids on their feet kicking it into the air, try for no spin. Demonstrations and repeat.
If they're doing well, have them try to do it twice in a row, no spin.
Kicking off the ground.
Then kicking in pairs. Try to get it in the air to their partner. Set up some cones so it can be a reasonable difference. Good ones demonstrate. Individual coaching from you and your assistant for the kids who aren't getting it. This will be sloppy but gets a lot of practice.
Make that a contest. Who can get the most consecutive in the air to their partner.
Finally two teams to goal to try to hit the net on the fly. First to 10, etc.
Might take a few sessions to get to the kicking it off the ground if you're spending a lot of your practice time on unstructured play and have limited technical time.
Don't worry about weak foot to start, layer that in after most of them get it with the strong foot. Being comfortable with the form striking the ball out of the air and compounding in that is more important than being good at kicking it off the ground. That can come with time.
They won't get it at first but if they like soccer and practice at home they should develop. You can announce contests for next week to see who can improve the most, get the most consecutive no spin juggles, etc.