Hello guys, i have 4 Jills, 2 are workers and are 2-3yrs old, and my other 2 are 11 weeks old, i put my two 11week olds ones down a small warren behind my exsperienced worker and they enjoyed it ,, so im jus letting them play in there run with tubes and putting them in small un active warrens to give them practise because they seem to enjoy it .