Latch: First switch activation turns appliance ON; second activation turns it OFF.
Ablenet, has a holiday gift ideas page. They are announcing 20% off on selected items in the holiday buyers guide area. The Powerlink 3 is listed there at $200. Check ebay too.
Some toys that will operate with a switch and a Powelink:
Slot car race set - I found one on Amazon for $34.99
Portable Radio - I found that a small portable radio makes a great music source. If it has a cassette and you have some old tapes, it works best. A DVD or CD doesn't work with the power interrupting because you have to start it again and have to press the play button to go again.
North Pole Christmas Express Train set - $44.99
Lite Brite - a whole bunch of them...
Stir Crazy Popcorn Popper - Kids love to watch the wire kernel pusher go and turn around. There switch can control it.