In reality and proven scientifically, the best striking position is a result of the right AOA (angle of attack), smash factor, use of ground force, and getting the club head square at impact. To do so, the clubs have to be built correctly to length, weight and flex so that optimal performance can be achieved.
We have built a 40-inch 7 iron (the standard length is 37 inches) that weights 485g in total. It is meant to give parents a taste of what your child is experiencing and why they cannot achieve the basic perimeters for getting into the right striking position.
Finally, we would also like to highlight that most fitting charts for junior branded clubs are a scaled-down version of adult club measurements and these are flawed. Junior golfers below 15 years of age do not have the body proportions of adults. Their head, torso and legs develop at different rates and these factors have a big impact on how clubs need to be optimized for juniors. It should not be scaled-down from a standard adult measurement chart.