I thought it would be nice to have the rocking horse slowly rocking back and forth in our animation as it would be windy outside in the storm, and it is highly likely that wind would come into the tree house. Having the rocking horse slowly moving would also seem slightly scary as i can imagine having creaky sound effects creating a slightly unsettling atmosphere.
I had to redo the rocking horse as when i first animated it, i forgot to move the pivot point to the bottom of the horse, so the movement looked rather messy. Once i had changed this, the rocking horse was fairly simple to do.
I have also done a crayon falling off the chest of draws as the wind would be able to effect many things in the treehouse.