It's always difficult to determine value - so many variables come into play. With Carnival, it's not only the pattern, shape, condition and colour that matter it's also the quality of iridescence.
You're so lucky that your mother bought you those pieces. I have a bowl that my father bought me many years ago when I first started to collect Carnival Glass. He didn't have a clue about the glass - he just recognised that it was Carnival and was what I had begun collecting.
It's just an ordinary bowl in a common pattern - and it has poor iridescence. But do you know - it's more valuable to me than many pretty, high dollar pieces in our collection because of what it represents. I wouldn't part with it for the world.
I wish you well with your collecting and I hope you get much pleasure from it.