Being designated by the principal to decorate the Christmas tree should be a cause for joy (maybe even pride?) but no, most students find excuses not to do it.

Why? Because the tree is large, you need either a really large ladder or magic to decorate it properly.

"Here."

Jack handed you a red bauble while you were standing on a ladder. You might as well switch places.

It's not that he wants to help you, just contribute to the Christmas preparations!