From science blog Pharyngula:
Here’s another odd pink phenomenon. This is a page from a Toys’R Us catalog, illustrating some science toys, and note the odd distinctions being made. Both the telescope and the microscope come in special pink versions, just for the girl who is apparently more interested in getting an instrument that matches her nail polish than being functional, and note also (you may have to click through to see the larger image) that in every case the pink model is less powerful than the black and gray model. There is a message being sent here. Being feminine, being girly, means you belong in a separate category in the science world, and it’s a category that needs less utility and more concern about appearances.