I couldn't recall the name, but yes "Cat Tails". I remember taking my little ones there, but i is kinda sad. Everytime I think of that place my brain goes....I live here currently. Most of the above is true. But Churchills and Durkins are places I put on decent clothes and take my wife. Either would be a $200 bill for you, wife and couple kids.
Manito Park much safer and roomy than anything downtown.
The powerplant stuff is all cool....and spendy. Steamplant grill is neat, but again...these are not gonna be $13 burger plates.
Basically skip most anything "downtown". South Hill will be safer and more "uppity" which will be anything S of I-90.
Cat Tails park is a semi sad big cat viewing place north of Spokane. Might be worth an hour or two.