First you go to the farm. You will see a house with broken windows. Jump on it.Then enter the chimney. If you look closely you can see glass bowl. Pick it up, then exit through the chimney.Go back to Main Street and go into the Carrot King Diner. Walk around until you see a lady dressed up as a waitress. Click on her and ask her if she can pour some milk into the glass bowl. Then go back to the farm and go in the chimney again. Walk to the end of the room and there should be a box that says up. Jump on top of it and climb up the light.Go into the bathroom and turn on the shower. A gray cat will jump out of the tub. Chase the cat downstairs and lead her to the bowl full of milk. Once she is done drinking it, she will follow you where ever you go. Exit through the chimney again and go back to Main Street. Go into Charlie's Hardware store and give Charlie her cat. In return she will give you a crowbar. Go to the factory and find the vent system blueprint on the roof. Then go down to a big pipe. Open it with the crowbar.
Use the crowbar to open the sewage pipe tp enter the warehouse on 24 Carrot Island.
you don't open the crate
The closed Carrot Cake Factory is to the right side of 24 Carrot Island. You will need a crowbar to get in through the sewer pipe at far right. (see related question)
Ratman is on Super Power Island. There is a large rat in the sewer entrance to the factory on 24 Carrot Island (climb up into the bypass pipe to elude him).
You enter the old carrot cake factory through the waste pipe along the water at the far right. You need a crowbar to open it, and you can get one by recovering the missing cat. (see related question)
the factory, get the crowbar to open the vent
The only underground apparatus on 24 Carrot Island is the equipment stealing the carrots from the carrot farms. (They are used to make rocket fuel.) The operations of the evil Dr. Hare are all in the old Carrot Cake Factory to the far right of the island. You can get in through the sealed waste pipe if you have a crowbar. (see related question)
At the Carrot Cake Factory, take the map from the window near the roof, and open the pipe using the crowbar. Inside, you will find the Carrot Transporter that can take you out of the factory. Cross the red "bottle cap" trap doors one at a time, and slip past the rat by climbing through the loop pipe at the top.
24 Carrot Island is the 4th island of Poptropica. It came out in June, 2008.
The mayor of the town on 24 Carrot Island will give you the Island Medallion when you complete the quest.
You can't. You can only talk to the guy.
When you complete 24 carrot you can re-open it!