[مستر/ عصام الجاويش]

I found this extract from The Encyclopedia of Superstitions by Richard Webster on line:
People turning twenty-one are often given cardboard keys to celebrate this milestone of maturity and independence. Alec Kendal mentioned this in his popular song I'm twenty-one today, which was published in 1912.
I'm twenty-one today!
Twenty-one today!
I've got the key of the door!
Never been twenty-one before!
And father says I can do what I like!
So shout Hip-hip-hooray!
I'm a jolly good fellow,
Twenty-one today."