Racket

Oke :) Thanks alot. Think I will order A  Yasaka stomme Extra then and hope it will works better :) And 1 more thing. Im the Trainer at my Club for the Children. You know any good "practice" for bending your knees becouse I'm having some problem making them bend there knees while playing.

hahaha I remind them every training :P But im gonna try one thing. You know the Practice "The Morron" ? You have like 4 cones. And you run to the first, then back to the start. then the second then back to start... and so on. Make them do that twice one time with bent knees and 1 time with not bend and take there time. And maby they get it :D Gonna try that and see if it works :) Thanks :D 
BTW. Can you make A video about Dubble??

The Drill is going kinda okey. I do like. The team that lose have to do 20 Push up EACH. So that everyone do there best. Well everyone bend there Knees but when they do it they want to turn the Cheast forward so it goes faster but then I punish them to do 5 Push up but I keep on doing it until all of them bend there knees when playing.

The Doubles I just mean the basic like what servs to do and NOT to do. How to think when your moving and whats the easist way to win the ball. The kids I train have problems with it. I have tried to tell them. Don´t hit the Ball so hard. Just keep it on the Ball and Aim for the Guy that hit the Ball to you so he´s in the way for the other guy and so on. But they still want to Hit the Ball and miss and lose the point :P If they see someone More Experience and Grownup say it maybe they Lissen.
I use the send them the Youtube clip if I see something you have put up that I want them to see. If there is something they have to think about for example the Underhit topspin. They have found it more easy to hit if you dont got the time to make A normal topspin and still works better then just A normal Hit. 

BTW. Just an Idee to you. If you allso have them problem to do something do like I did before. Everytime they diden´t do as i said. I punished them with A think called "eternity" 2 teams. One team on 1 Corner and the Other team on the vertical corner. Then when I tell them to 1 on each team RUN! and are gonna take the other guy that run on the back. When you have run 1 turn around the hall you swap to next person and so on until 1 team take the other on the back. And to make them run I make like A punish there to like the person geting taken have to make 10 push up. Then everyone run becouse they dont want to get taken. Just an Idee to you ^^ Thanks agian for the great tips :)