Just had a rather expensive trip to Maplin to get some educational toys for, er, my children.
Got William a Slinky at the checkout.
The Beavis (or Butthead) in me is delighted to discover that they are made by the good people at Poof-Slinky, Inc on Beaver Street, Hollidaysburg, PA.
Visit their web site. Enjoy the Poof-Slinky song and browse the exciting range of Poof Toys! Caution: subsequent analysis of your browser history may cause embarassment.