This video shows a number of drills for younger kids that they use at Muncaina Peppers in order to improve on a variety of things including footwork and ball control.
I'm a subscriber to the channel (youtube), congratulations on the excellent material. I am a former university professor teaching sports training and volleyball. Former fitness coach of national league teams. Today, I have a channel that talks about non-profit volleyball and would like permission to use parts of your videos in around 10 to 30 seconds. when using it I will quote the source, indicate the channel and put the link in the description. Thank you await return.
This is a good question and you identified that main problem with this drill, that it doesn't promote proper follow through. Players should be coming across their body like throwing a baseball, here you would either hit your leg or the floor, so you notice the kids don't follow through and that will carry forward to hitting at the net. The same drill should be done standing up, like this is not a good idea.
