ok go to faerie land and put ur mouse over the sky and then it wil that little phrase and click it(the air) and the tada the tower! oh and the baby paint brush is like a million neopoints! but i finally bought me some asparachucks and i beated the chia clown in one hit! woo hoo!
Try to save up. You can get an avvie when buying something there for the first time. THe trading post has them 2k cheaper, but I recommend the Hidden Tower.