Yep, I remember them as roly-poly's too, lol
I'm not sure about the flying ones, but as stated in an earlier post, I've always heard that the Daddy Long Legs is one of the most poisonous spiders in the world, but their mouth is too small to affect humans. Only heard this stuff, never researched it. All I know is that my brother and I were quite mean to them when we were little, lol...but now I welcome them in my garden if they kill and eat insects that mess with my plants!