How do you get to the second level on Phineas and Ferb for DS?

To reach the second level in Phineas and Ferb for the DS, you need to complete the first level by collecting enough items and completing the tasks associated with it. Once you finish the objectives, the game will unlock the next level. Make sure to pay attention to the hints and items available, as they can help you progress smoothly. Enjoy exploring the adventures of Phineas and Ferb!