Glider spotting!

Yes kids, those are also airplanes. Without engines and they are catapulted (winched) into the air. No, they cannot run out of fuel. Yes, pending available thermal conditions they can stay in the air as long as they want. No, we can’t have a go today. Yes, I like them too. Please, let’s eat, your lunch is getting cold. Yes, those three will also be launched, and you can look while eating. Yes, the view is also good from our lunch table. Please?