Are there any secret items on Poptropica?

Yes, there is,for instance:

1.If you go to time tangled viking, you can use the wings to float to the left of the cliff to get a viking costume...

2.Also if you finished Nabooti island you can dial some phone numbers in the phone to get costumes for example if you type in 911 you get a police costume. There are several others but I forget.

3.If you finished Mythology island you can put on the crown and staff. While wearing thees, if you press the space bar you'll grow and glow.

4.If you complete a mini game you can usually get a cool costume or item.

5.Also if you go to the store and buy some free places, if you complete the place you can get a cool costume.

-For the Earth Day place you get a Earth Day shirt

-REALLY GOOD---------Go to the haunted house and beat it, it will be hard,then go to the party and YOU CAN COSTUMIZE FROM COOL MONSTERS

-Grim Reaper

-Witch

-Skeleton

-Mummy

-etc.