Tennis turning

We waited for the delivery of this article with great impatience. Family of 3 children we knew the game because we had one of at Decathlon. We wanted to test with the endless screw system. We are all disappointed. This requires hitting the ball at the same speed so it goes up or down it. Suddenly, a 5 year old against a 10 year old it can not function. It's always the same playing! The Greatest!
Snowshoes are also heavy and not very ergonomic.
The most and that's what decided our purchase, planted stake. No footprints in the lawn.