I have a two year old Dalmatian.
He came from a very reputable breeder who had the litter BAER tested, limbs, vet inspected and vetted us thoroughly. We weren't allowed to choose a puppy until the breeder had met the whole family and grilled us as to how much we could exercise him, when we were out etc.
He is the most amazing dog you could ever wish for, full of character and just so loving and gentle. I have 3 children of 8 and twins of 10, they chill out together on his bed and they ride him around the kitchen (not putting their weight on him obviously). Play with him for hours which they all adore.
He was dead easy to train and I know that goes against the general consensus of opinion on Dalmatians. He sticks to us like glue and never runs off, fantastic recall and loves chasing tennis balls. I did take him to training classes initially but it really wasn't difficult.
They do need a fair bit of exercise and like someone said up thread an almost pathological need to almost 'bolt' for a few minutes and stretch every limb - wonderful to watch though. I was scared by the whole 'they need two hours of off-lead exercise every day' - I've found as long as he gets a good run even if only for 20 minutes a day he is fine. Saying that I always try and take him out for an hour or so and once a week a good 2-3 hours. If he's not exercised until later he prowls around and climbs all over you for the whole day!
The hair is dreadful.
One of the best decisions I've ever made but I do think that they need people around a lot - I know most dogs do but Dally's are exceptionally people orientated.
He's 'talking' now and it really is one of the most endearing things about them!
Tail is like a whip, not sure that your DC's are quite old enough yet OP but maybe a dog for the future? Do you run at all? You really do need to be pretty active.
Any other questions feel free to ask 