Go look in Club Penguin's Box Dimension room!
There's plants from the adventure party in the Box Dimension room. Weird?
If you don't know what the Box Dimension room is, its a room that can be only entered though a special box. These special boxes were purchased during the April Fools party that some penguins put them in there igloo. If you stand on the special box, it takes you to the Box Dimension room!