The children of today can't ignore it; computers, telephones, tablets, social media and violence. Before you know it they are already involved. They see and hear everything, often the things that you do not want. That relates to the development. They learn very quickly at an early age and absorb everything they see. That is why it is so important that the "basis" is good.
It is often the case that children develop less well in practice when they regularly play indoors, not far from their beloved games computer, their parents' phone, the tablet with lots of games. You often hear parents say 'you do not have a child'.
They just do not think that the motor development is very important for a child at a young age. Children grow and learn at an early age, they grow inches in a year, learn to cycle and walk.
Why not give them discipline, norms, values, rules and judo in this important development period?
Judo is not a martial art, judo is one of the most physically demanding sports there is and everything revolves around control, safety and balance.