I'm really into having fun with Poptropica currently. There are several different islands which you can do in the game now. My all-time favourite so far is probably Astro-Knights Island. It's hard to describe and that's what makes it so much fun. It's basically an adventure with knights in armor but in outer space. You are trying to rescue a princess who has been kidnapped and taken to a different planet. Along the way you have to also rescue the three other knights who tried to rescue her before you and failed. It takes a considerably long time to complete and there are some very challenging puzzles in it. I used these Astro Knights cheats to help figure out some of the difficult parts. The jumping robot fish on the Ice planet was really difficult. So was the dragon at the end of the Fire Planet. But the toughest part of all was the final battle with Mordred. First you have to catch all these bombs that he throws down and then drop them on him before they go kaboom. You have to get all the timing down exactly right to do it. After that you do the second part of the battle where you jump around avoiding his laser beams and you try to get him to hit the lights instead so that they fall on top of him. It's really tough!
Even with all the help I managed to get using the step-by-step video tutorials I totally failed the initial few times. But I did finally get it right and I won the battle and got the medal at the end. It felt amazing to finally win it! And although this quest took forever and was so hard, I enjoyed it a lot. I would rank it as the best island in Poptropica. I'm still working my way through them and am looking forward to trying out Counterfeit Island and some of the others soon.