What is the meaning of 7 lollipops in a 7th birthday party?

The seven lollipops in a seventh birthday party symbolise good luck and fortune in Japanese culture. The Japanese word for 'seven' is 'nana', which can also be pronounced as 'naname', meaning diagonal. Diagonals bring about equal sides, representing balance in one's life and a sign of good luck. Hence, seven is considered a number of fortune