This excellent little series, apparently inspired by Scott McLeod's legendary Understanding Comics, is a kind of half-game half-Flash movie experience that explains the principles that make games worth playing. That link is to the first installment, but links to parts 2, 3 and 4 are on that page. Each Flash movie is mostly just that, but at some point in the presentation allows you to handle the 'game' to experience what the presenters, Bub and Bob, are talking about.
Great little point and click that's easy enough for nuff-nuffs like me, with an in-game walkthrough that reveals only as much as you need. Vibrant illustration is cheery for a blah day like today. The Worteldrie website has a lot of good kids' games as well.
OMG Scary Room!!1!
AKA AN Escape Series 2.5. Parody of point and click games which is logical (ish), fun and amusing to my mental age of 13. Jayisgames wouldn't run this on account of it contains words like "ass" and has a dildo in it, but they run horror games with severed heads! And, come on, you totally want to play a point and click with a dildo in it.
This is one of those games where you register and create an avatar. As you play games and engage in PvP battle, you level up and get new equipment for your avatar that helps it win battles, perform quests etc. Normally I hate this sort of thing because it makes my clapped-out old computer fall over, but this site loads quickly. The games are a bit limited, but I quite recommend Wet Dreams (! not what you're thinking) and FlashPiper. As you play and submit scores, your energy is reduced and you have to rest, but it also enables you to level up. PvP is a good way of leveling up, as you don't lose anything by participating - even if you lose a match you gain a small amount of experience points. If you win, you gain a large amount! Yay!
On the down side, it seems to take a while to get to the point where you can play quests - I'm level 3 and it's not allowing me into the quests. This gets a bit frustrating. The avatars are... frankly unattractive - actually, hideous would be a better term - but I've managed to make mine look like the late Kurt Vonnegut, which is kind of gratifying. I'm looking forward to finding out what you get as you progress through the levels, though, and at this point, it costs nothing to play.