There is a nice Parkzone package called the Slo-V, akpilot, that is worth a good look.

The Slo-V is a graceful slow flyer, and it comes completely ready to fly with everything you need in one box. It flies so slowly that it can be flown in a large gymnasium when the weather won't allow outdoor flying.

The one thing that the Slo-V won't do well is fly when it's windy. You and the kids will be grounded if the wind is blowing harder than a gentle breeze.

Good luck and good shopping!

Edit:

Oh, I forgot that you mentioned GWS. The GWS Slow Stick is a wonderful electric parkflyer that a lot of folks first learned to fly with. The Slow Stick comes as "almost ready to fly" and you'll need some help from your local hobby store with picking out a Radio system, electronic speed controller, charger, and battery. You'll have more assembly to do versus the Slo-V, and by the time the Slow Stick is built and actually ready to fly, there's a good chance you will have spent more, too.

Price out a ready-to-fly GWS Slow Stick with your local hobby store and then compare it to Parkzone Slo-V. Which ever plane makes the most sense to you and the kids is probably the one to go with.