Sam is still crazy about bugs. I love how enthusiastic he is about life in general, but the great outdoors in particular. I find myself being amazed anew as we look at things like dried rose hips on the neighbor's bushes or the beautiful striations on a grasshopper's legs.
I've been reading Last Child in the Woods , and looking forward to a day when Sam has much more wilderness to roam than the mere 1/10th acre we currently live on. However, there's also much to be said for finding and celebrating the wildness in your own backyard or neighborhood. Sam, being as small as he is, doesn't really need all that much of a yard, and given my slacking off in the gardening department, it's plenty wild!
I think more than where you are and how much land you have, the attitude with which you approach nature and exploration are more important in instilling a love of nature in your kids. We really try and encourage Sam to be hands on, inquisitive and respectful of nature. He really doesn't need much encouragement though; he's been in love with the outdoors since day one. What this looks like on a daily basis is picking up dried seed pods at the park, dissecting them and talking about how trees grow, pointing out hovering dragonflies and nesting birds, watching the ants in the sidewalk cracks, digging worms in the front yard, collecting leaves and sticks and reading books (he prefers grown up guide books with real photographs).
We've found that there's plenty of nature here in the city when you look for it, especially when you look with the wide and curious eyes of a two year old, that never miss anything!