Ages and gender of your kids:

Merlin:
Girl: 6
Boy: 3
Twins: two boys, 1 1/2

Arthur:
Boy: 8
Girl: 6 (her and Merlin's daughter are friends.)
Boy: 3

Mordred:
Boy: 2 (one. So far..)

Gwaine:
Girl: 9
Girl: 7
Girl: 4
Boy: 2
What do you expect? It's Gwaine.