Find the Number Ball!

Find the Number Ball! is the second last level in Yoshi's Island DS (not counting secret and extra levels) and it features the number ball strategy again from Six Face Sal's Fort where an number ball takes the place of one of the player's eggs and the player has to throw the number ball into the correct slot that has the number of the ball on it. However this level is basically all about collecting the number balls to complete this level while in Six Face Sal's Fort the player just completes a part of the level. This level apparently also features lots of lava.