Get the rope from the water wheel of the mill. Bring it back to the castle and climb up to the crossbow archers. Tie the rope to one of the big arrows, aim it up and to the left, and you will hit the Princess tower door. Walk the tightrope across to it. (Note : afterward, be sure to look under Mordred's bed at the museum.)
There are no cubes on Astro Knights island. There are ice floes on the Ice Planet, that you jump across to avoid the robot fish.
At the top of the ice mountain.
go to ice or fire planet but fire is the hardest
they are around it and you have to lead them 2 the black hole
You get it from the ice knight on the ice planet.
The space sharks are surrounding the Ice Planet at X-73 Y-83, down and to the right from the planet Poptropica.
the knights are... ...one is on the volcano planet ...another is on the ice planet ...and the third id on the jungle planet GOT THAT?!
On the Fire Planet, you get it from Sir Peleas when you reach the bottom of the interior of the volcano. (see related question)
The coordinates X73 Y83 are the location of the Ice Planet. It is guarded by three space sharks. (see related questions)
There are no fish on Astro Knights Island. There are Space Sharks around the Ice Planet at X-73 Y-83. To defeat them, shoot them and lure them to the Black Hole at X-85 Y-47. (see related question)
On Nabooti Island, the Mountains of the Moon have a snowy path to the top. On Astro Knights island, the Ice planet is one of the three planets to defeat.
Those are the coordinates for the Ice planet, down and to the right of the Pewter Moon (X-56 Y-52).