Build-It-Yourself inspires kids to build their own toys, robots, puppets and other inventions.

Spider lurking for some tasty bugs:
(Click to watch the spider climb.)
A Sidewinder Gear Train winding and unwinding a string makes the spider go up and down its web. A Wind-up Sensor detects when the spider is at the top and reverses direction of the Sidewinder Gear Train.

The spider is made from a pecan, a bead and some brown pipe cleaners. Drill a hole in one end of the pecan. (Follow the Tool Rules carefully.) Then insert a fish string in the hole. Put a screw in the pecan hole to secure the string in the pecan. If you tie a knot, you will not be able to adjust the spider position so easily or take everything apart for maintenance.

Exotic Garden Snake:
(Click to watch the snake spring.)
A Sidewinder Gear Train controls the Extender Arm to make the snake spring on unsuspecting spiders..

Pigeon Admiring a Daisy:
(Click to watch the love bird.)
A modified Power Top Gear Train makes the pigeon sway around the flower.