Bobbles ommited?

I am wanting to do this pattern for my Auntie and I dont want to do the bobbles, do you think it would work without them? Couldn’t I just keep knitting where it says to MB? Could I also use red heart ww yarn? Thanks for your help.

I think you could get away with it. Any minor difference in size won’t really matter since it doesn’t have to fit a person in a particular way.