Children and herps don't mix ... I think it's good to introduce them and let them look .. but no touching ..
I keep mainly fish and I have an 11 month old boy and got rid of the common snappers, the electric eel, electric cat, moved the piranhas to higher levels in the fish house ... whilst children and the hobby are not mutually exclusive you just have to use your head ...
My little one is now fascinated by the pets -- particularly the bloody great tegus that look like great fun, currently they are housed 5 ft off the ground but I am building a new enclosure which will be at ground level - it will have ruddy great locks on the doors to ensure that there is no child access. - the snakes already have lockable lids. A bite from my male tegu (and its only 42"
would easily remove one of the little boys fingers!!
And russ I know what you mean about washing hands !! -- split knuckles dry skin -- I think i go through more hand cream than the missus 
carl