While you could use best floor covering for the courts that are to be set up in your stadium so as to train the children or youngsters on several games you should be very cautious about how you could do this. If the floor is made of the normal cement flooring on top of which you have arranged some sort of carpet then you would have to hire the cleaning staff to clean all of the covering that is done by you for the indoor set up. Also, building the complete indoor stadium would be too costly. Rather, constructing a small admin building and leave the entire ground as open space with the proper care taken to grow grass in the ground is the best idea.
But, for this idea to work out, you should ensure that the grass grows simply clean without having the weeds between it. Since, not everything happens as what we want it to be, you would notice the weeds growing in plenty and this would create a kind of tension in your mind. So, the best solution for this is to get the good weed killer from online store and apply it exactly the same way as is provided in the instructions page of this product on the store so that you get the best results.
Once you start using this, you would notice that the grass on the ground is clean and is simply attractive for the players. They would feel inspiring to play in such a clean ground. Youngsters would develop spirit of sports and thus would work hard to meet their targets. They would strive hard to fulfill their dream of becoming a player at national level. Use weed killers and eventually be happy that you are giving the nation the best players.