Double categorizing (labels) our blogs with age groups

Since some of us have kids that are similar in age and some are a bit older. I think it'd be nice to give our post 2 separate labels, one is the topic (ie, feeding, sleeping, crafts, etc), another label would be the age, ie, 0-1, 1-2, 2-3 years, 3-4 years, so on). It'll make it easier for us to sort thru the topics as we get more posts in the future with more membership, what do you think?