Every kid knows that half the fun of building things with blocks is knocking them down. The Advanced Engineering Toy Set from American Toy Co. cuts right to the best part. You can build either 4 or 8 story buildings in a few different styles and then have fun while realistically imploding them with the plunger and timing plate for a controlled collapse in any direction. Probably best if you taped it with a slow motion camera for fun. You can rebuild and re-implode over and over again.
Useless Box Kit - The Original Useless Box Kit, Also Known As the Useless Machine or Perpetual Machine, A Perfect fit for Geek Gifts Desk Toys or a Cool Gadgets Gift