Running cables is no fun at all. Luckily, in this day and age, you don't have to deal with wired Internet if you don't want to. You can buy a wireless router and wireless cards for all your computers.
Most of your laptops will already have wireless cards built in. If they don't, you can add one. You can also take the laptop over to the router and associate to the Internet there.
If you want to add one, find out which types of wireless cards you can use. If you have a Pcmcia or Expresscard slot, you should reconsider one of these, since the cards don't stick out of the body of the laptop. They slide inside it. This means there's less to catch on something when you're walking nearby with the laptop.
Check your hand-operated to see if you have one of these ports. You can also bring the laptop to a decent computer store. The worker there will be able to tell you which type of ports you have.
After all your laptops are wireless, you'll want to make your desktops wireless. You can whether buy Pci wireless cards or Usb wireless cards. The Usb wireless cards are easy to set up. You can even buy one card, and use it in manifold computers. This might be a way to operate your children's Internet use.
If you want a permanent connection to the Internet, you should install a Pci card. This is a card that goes right inside the computer. If you're not comfortable installing cards, then you'll have to get man else to do it. I'm sure a neighbor can do it. If there's no one else, you can bring it to a computer store, but they will probably charge you to put the card in and set it up.
After you have installed wireless cards in all your computers (laptops and desktops) you'll be able to surf the Web wirelessly from anywhere in the house. This is a much easier way to give the people in your house access to the Internet.
Cables are the past. Wireless is the future!