You will not regret making a Phantom purchase. Just don't expect too much, or get disappointed if something breaks.
It's all part of R/C, no matter if it's a boat, car, monster truck, airplane, etc. The manufactures build them with the
basics, and the aftermarket is where you find the stuff you think it should have come with. The secret, is finding the
perfect balance between stock, and excess, where the frame can't handle the mods.
You are bound to get bitten by the "bug", and so will your kids. Research each additional component, and weigh the
benefit, verses the negative, which is reduced flight time due to the added weight, and power consumption.
With the Phantom, especially with the kids flying it at first, you will do well with the prop guards, but don't add that
$400 GoPro just yet.
The Phantom will be a great "beginner" platform. You are getting into it fairly early, and soon there will undoubtedly
be many, many choices of quad rotor machines with enclosed shell designs. The technology, options, reliability will
become better, not only by competitors, but by DJI as well.