Not as far as age appropriate, but types of toys.

When my girls were babies I had a lot of toys that made noise, lit up, basically not very open ended toys. Don't get me wrong, they enjoyed them but they lasted such a short time. Now I aim for toys without batteries as much as possible. More open ended toys, that can last through their stages and not get thrown in the closet after 6 months so I can get my money's worth out of them!