Roboscooper (TM) robot by WowWee is one of the newest robot toys that WowWee introduced to the market. It is able to pickup things around at the same time entertaining the kids. Price is $44.95 at Amazon.Com. Visit product page at WowWee website.
Hexbug (TM) from innovation labs comes in a variety of shapes and colors. The prices vary from 5-25 dollars, depending on which model you choose. Here is the official website, where you can also order online.