The Wonderland Board

I am stuck on the part where the kabooms are and youre supposto put the boxes to trap them. The problem is: how do I arrange the boxes to trap the kabooms?

Push the first box 3 tiles up. (1 on the screenshot) Then push (2) the top-left of the 4 boxes in the middle 1 left. When the kaboom is at the "K" push it left again to trap it.

Also the right side: Push (3) the top right box 3 right and (4) 1 right, and right again to trap the kaboom.

I hope this helps.

Thanks, Marinus