How do you get across of the river in the mission vegetable villain on club penguin?

If you're talking about Mission 11 then heres your answer,

1. When you walk in the corn maze, go in the wrong direction once, or where you'll find the third or fourth piece of note you'll see a wooden plank.

2. Grab the plank

3. So go to the river and put the plank on top of it

4. You should be able to go across