I got these bags, and the was hunting online to figure out, and I found out that it is a LEGO set from 2007, specifically from the Construction category. It is a set with the LEGO CITY set name "Harbour Wharf & Crane", which includes 3 bags of #3 and 1 of #5. This set is likely to be of interest to LEGO enthusiasts who enjoy building onto this specific set, or other sets in this series of lego releases in 2007, and may be part of a larger collection of LEGO bricks, pieces, and parts.  I remember when I was a kid, we had boxes, and boxes full of legos, and would let our imaginations run wild, and would build all sorts of things, so this might be fun to add into a larger collection!