Is this camera a good one for someone who's interested in taking macro pictures?

Http://www.amazon.com/Nikon-D3100-Digital-Camera-Included/dp/B005PREXF6/

If not which camera for about the same price would be good?

Yes its a good cam

Yes it is a good camera, But if you want a little better camera for just a bit more performance get the Nikon D3200.