We typically recommend it works for players from 5 years and up but have heard about children aged 3 using it. As we state on our website, the TopspinPro is for players of all sizes – “Whether you’re 5 years old and 3 feet tall, or 80 years old and pushing 7 feet – the TopspinPro will adjust to just about any player”

You can see the below article by our resident coach Zoë on drills for kids: https://topspinpro.com/blog/tennis-drills-for-kids/
Also see here for the weight and dimensions should this information help you: https://topspinpro.com/knowledge-base/topspinpro/suitability/what-are-the-dimensions-and-weight-of-the-topspinpro/