Corrections in red.  Stylistics in blue.

Overgrown Keyboard Joke

I've read about a funny practical joke on a social network.  It's intended to be played on your office colleague who is going to arrive from a lengthy vacation and intended that you are office employee. You need wadding and the seeds of some fast-growing plants and wadding. Remove all the keys from your colleague's keyboard, place a thin layer of wet wadding on the base of the keyboard, scatter the seeds, and put the keys back in place.  In a few days, you will see green sprouts growing between the keys. When your colleague arrives, it will be looking like he had a real long vacation...

I'll appreciate corrections!  Variant:  Corrections will be appreciated! ;)

I'll have to try that when my boss goes on vacation!