Newbie Alert<br /><br />New to me boat and I want to tube with my kids. I have never done it. 4 kids, all very different weights.<br /><br />I have been warned that cheaper tubes flip easy. Also that I need a very good tube if I put two kids on, cheaper ones will flip if the kids are not the same weight.<br /><br />Can somebody point mne in a good direction before I waste any $$?