Wow... both of your examples, SuperCub and EasyStar were my own first 2 airplanes. I crashed the EasyStar (all foam) a few times and even glued it back together again in a frankenstonian way. It still flies and my friends who want to try out flying for themselves begin on that one.

The SuperCub is great for learning take offs and landings. Especially the landings. It could use a stronger landing gear (you might have to bend the supports back into place every 5th landing or so) but it is adequate and does its core function well. I would use 2 3/4 wheels on it though, otherwise you will indo on rocks and small bumps and any grass.