My nephew is about the age where he can understand electronics. I haven't done much with electronics since I was a child, so I'm a bit out of my facility with this. So, I'm wondering where to start? Especially, with the idea of robotics. What are some good basic children's books? Is there an online store that sells kits for children? I remember having these boards that all kinds of electronic devices on them and you would attach wires to springs and you would make a radio or flash some LEDs or whatever. I just have no idea where to buy these things or what is a good book.