In Ireland the birthday child is lifted upside down and "bumped" on the floor for good luck.
The number of bumps given is the age of the child plus one for extra good luck.
Being given the key to the house is still considered an important sign of coming of age in Ireland. This takes place when someone turns the age of twenty-one. The young man who was given the key to the house is said to be given permission to come and go as he pleases and to stay out as late he liked.