Get ready for some brain-teasing fun with our mechanical puzzle collection. With “Get Charged,” try to remove the authentic sparkplug from the wooden box. With “Nerves of Steel,” can you maneuver the spiky sphere from its metal cage? And with “Hole In One,” can you slide the four colored wooden blocks around to form a square in the center? Three fascinating challenges for hours of puzzle fun. Solutions included. This item measures 5-1/2” long x 4” wide x 1” tall. Solution included.