Simplify the following text for a Grade 3 native English-speaking person.
Original: Beatrix ( Beatrix Wilhelmina Armgard ; born 31 January 1938 ) is the queen regnant of the Kingdom of the Netherlands comprising the Netherlands , CuraÃ ao , Sint Maarten , and Aruba .
Simplified: Queen Beatrix is the Queen of the Netherlands . She was born on January 31 , 1938 .