iPads top the holiday wish lists of many children. Retailers report that electronic games continue to be among the 10 most desired toys for both boys and girls. At Temple's Infant Lab, psychologist Kathy Hirsh-Pasek studies how kids learn. She says learning and development happen when kids are interacting with the world around them. "We do know that for fine-motor coordination, you need to pick things up, you need to maneuver them and you need to use your fingers — and you can't substitute watching for doing, " said Hirsh-Pasek, who co-directs the lab.