It is in R-Fair City
get sunday donut . then trade at mall at mr. z shop.
You have to buy it from the donut shop with 40 cyberberries.
You find 2 of them at the surf shop in the mall.
Get a chocolate donut first and trade with the prince in Aqurium-Yum
You get it at the crab castle in the throne room. Talk to the crab Prince and if you have the chocolate doughnut (you can get it at the surf shop in the mall) trade him for the jump module.
i think you go to the aquari-yum, go to the crab castle, go to the throne room, talk to the crab prince, and he will trade you it for a chocolate donut which you can get at the donut museum.
http://pbskids.org/cyberchase/games/quest4/quest.html
blubber
It is in the store.
In Radopolis
You buy it in the cybermall
The floating rock in Cyberchase The Quest is found in the Mission Motherboard Part 1. You can also find it in the Eco-Haven Emergency quest.