Early childhood teachers around the country and the world guide children's mathematical learning through the use of manipulatives--pattern blocks, base blocks, geoboards, Unifx cubes, Cuisenaire rods, coins, clocks, and so on. Manipulatives allow concrete, hands-on exploration and representation of mathematical concepts. In the past few years, online resources for virtual versions of these common manipulatives have become available. This paper suggests how teachers can integrate virtual manipulatives into their current developmentally appropriate teaching practice for first through third grades.