Lego Classics 900 piece box 11005. This is a great starter set! If your child has been playing with the large sized legos that they all start out with, and are ready to move into the small legos for building than this is a great set. It comes with alot of pieces, and alot of colors.
It's nice cause it has regular base colors, and pastel type colors, so girls can enjoy this set as a starter to. So people complain that this dosent have a storage case or instructions, but you can buy a nice storage tote for $4.50 at Walmart to contain them, so it's not really a big deal. As far as instructions, your child dosent need them for imaginative play, they really only need instructions if you buy say a "star wars" set to build a specific design.
This is a great transition set to start of with, and you can't beat the price for the amount you get. If your looking for a basic set, with lots of colors and pieces to build, this is a great set.