What if a key on the keyboard of my laptop gets removed by my bummer lil' brother?

One day, I am checking my Twitter account in my laptop, my little brother began bumming me for a kiddie reason. Then I got pestered that I began suggesting my sisters for his problem. He got pestered too and knocked the keyboard and struck the 'page up' on. The on then gets removed. My problem is, is there a way I can get the key to its normal position in just 4 hours?