My kids have become Lego-maniacs, especially after this last trip to Disney. They are now really into the Indiana Jones and Toy Story sets. I registered for the Lego VIP program and DTD, but I'm wondering where is the most economical place to buy Lego sets. Does anyone know of a good source? I have found that Target, Wal-Mart, TRU, and Amazon all seem to have roughly the same prices on the sets, except for the occasional BOGO at TRU.