Nigel and Rolland Creevey

Nigel and Rolland are the twins of Gabrielle and Collin. First book

In the first book Rolland and Nigel were age 7-8. They were not old enough to attend to Hogwarts. They were first mentioned when they were waiting for their sister to return for the holidays with their family at kings cross station.

They were also at the holiday party with their family the night Lily was attacked. They went to Hogwarts for safe keeping with their siblings and cousins. When the holidays ended they were brought to a safe house in the ministry of magic with their siblings and cousins.

They were then waiting for Abby to return from Hogwarts when the school year ended with their family. The last time they were mentioned was at the grave yard.

Book 2

In book 2 the twins were 8- 9 years old. They first appeared in their room refusing to get out of bed. That was until their older sister came in announcing they had gotten their letters. They were then at the wand shop in Diagon alley with their parents and older sisters.

At Kings cross station during the holidays, Nigel and Roland got lost. They came across the Summer twins who helped them find their parents. The boys were also at the Potter house the night Umbridge was killed.

 Nigel and Rolland were with their family at Kings cross station, waiting for Abby and Swan to arrive home for the summer. Their last appearance was at the tribute.

 Book 3 

In book 3 Nigel and Rolland were 9-10 years old. They first appeared at the wand shop, however they weren't directly mentioned. When the 11 12 and 13 year olds went out shopping, they stayed behind with the other underage kids.

 Nigel and Rolland were at Kings cross station waiting for Abby and Swan to return for the Christmas holidays. They also attended the Potter's Christmas party. Then when the children were told to line up so Hermione could figure out who broke the chandelier, both Nigel and Rolland were declared innocent right away.

 Nigel and Rolland were at Kings cross station waiting for Abby and Swan to return home for the summer. They were at the tribute and then were at the restaurant.

 Book 4 

 in book four Nigel and Rolland were 10-11 years old. They first appeared  at Kings cross station to see off their sisters.