ive never had canned peas, but i imagine that they are not too tasty. i eat mostly fresh veggies now, with the exception of some frozen in the wintertime. i dont have any children yet, but when i do i imagine that i will be even more fussy about things like fresh veggies. so no, i would not feed my kids canned peas.
to take that even further, i remember the first time i had fresh peas shelled from the pod... we always ate frozen peas when i was a kid. needless to say, if fresh are in season i choose them every time, even with the extra work to shell them.
lol, i remember my mother telling me that she thought that she hated broccoli until she moved out of her parents house... she had never had fresh broccoli, the only broccoli she had ever had was frozen, the stuff that comes chopped up in a big icy cube. she thought broccoli was this mushy green stuff, and was surprised the first time she encountered fresh steamed broccoli.