The most complex and difficult, especially for younger players is Astro Knights island, which uses some new concepts (coordinates, optional order for the planets). But many have figured it out eventually.
Steamworks and Skullduggery are also complex in their design. Often completing quests such as Mystery Trainor Shrink Ray can be complicated because it is possible to pass up a critical piece of information and arrive at an impasse when the later parts of the quest are attempted.
Time Tangled Island (3rd island) is harder than some later ones, because you have to figure out which items go to which time zone, in which order.
The Easy Half
1. Early Poptropica (Easiest)-10 m
2. Shark Tooth (Easy and Short)-20 m
3. 24 Carrot (Streight Forward)-30 m
4. Time Tangled-(Easy but Long)-1 h 30 m
5. Great Pumpkin (Mostly Easy)-45 m
6. Big Nate- (Easy but not streight forward) 1h
7. Spy-(A bit Tricky, mostly easy)-45m
8. Game Show-(Some Games are hard)-1h
9. Reality TV-(Some games Take Practice)-45m
10. Shrink Ray-(A little Bit Confusing) 1h
11. Super Power-(6 Super Viilans) 45m
Hard Half
12. Cryptids-(Driving-Motercycle/Truck) 1h 30m
13. Mystery Train-(Evidence/Capturing Thief) 2h
14. Nabooti-(Long,Confusing) 2h
15. Steamworks-(Plant Monsters/Puzzles)- 1h 30m
16. Wimpy Wonderland-(Wizard/Car Alarm/Salad/Bingo-1h
17. Red Dragon-(Dragon)-1h 25m
18. Counterfiet-(Black Widow's Lair)-1h 30m
19. Wild West-(Train Robbery)-2h 30m
20. Mythology-(Zues/Hades/Posidien)-2h 30m
21. Skullduggery-(Long/Captin Crawfish) 4h+
22. Astro Knights-(Monsters) 3h
there is no lapso island on poptropica
There is no Candy Island on Poptropica. There is no known plan for a Candy island on Poptropica.
Poptropica Island is already unlocked.
The 6th island in Poptropica was Spy Island.
The 3rd Poptropica island was 24 Carrot Island.
It is Shark Tooth Island after Early Poptropica Island.
there is no pet island on poptropica
The 21st island on poptropica will be mystery train island.
The 19th island on poptropica is Magic Tree house Island.
Early Poptropica Island was the first to be created
Where is the warehouse on poptropica's spy island?
I think early poptropica is the easiest island