If you google Jack Russell Terrier you can find anything you want to know about them. I will disagree with the fact that they don't like children. I don’t have kids, but when I walk with friend's dog Ajk, which I adore like mine he is nice to them. He lets them play with him, even when he's bored.
I will speak as his Doctor Dolittle and say how much he loves laser, so if you have JRT or any other dog breed which requests lots of hours outside, I recommend laser for sure. When we are inside his favorite toy is his ball.
"Come on, throw it!!!"
When you don’t want to play with him, he accepts petting instead. He is very smart, he wants attention and when he doesn’t get it, he maybe will do something bad, (pissing inside the apartment is his favorite). xD
"Watch me human"
Breeding dogs is like raising children, but more faster. This breed learns very fast. When we talk about speed, if you told Ajk cat or “maca” in our language or he hears cat somewhere, it s like he hears Roadsrunner’s “beep beep”. Does Will E.Coyote ever catch the Roadrunner? :D
"What did you say?"
I must say he is my favorite model as you can see.