They can be fun raced against one another, just looming around on your own pretty boring once you’ve dialled it.
So, the positives.
You’ll learn how to sail, watch the water to see where the wind is coming from and going to.
Have fun putting it together, working out the radio frequency you can operate on and steal other peoples device by changing it.
See how a sailboat works and how it has to be controlled, in your case remotely.
Marvel at the ingenuity of man and yourself once you master it.
The negatives
Lakes generally have trees round them that shield the wind causing big wind shadows into which the time will inevitably dawn that you’ll have to wade/swim into to retrieve your boat.
Kids will inevitably ‘want a go’ leading to the above
Wives don’t get it.