Meccano Motorized Building Set

The back side of the box has a water stain from when we moved and it got wet. Box has never been opened. Features & details: *The 10-in-1 Model Race Truck Set comes with 225 durable metal and plastic parts, plus real tools and instructions. *Follow the instructions to build 1 of 10 trucks, then take it apart and build a new design of your own. *The Meccano 10-in-1 Model Set are for ages 8+. *No batteries required. DEVELOPMENTAL BENEFITS: As kids connect pieces and discover how the building system works, they’re strengthening hand-eye coordination and problem-solving skills, while exercising their imagination! For ages 9+ requires 2 AA batteries (not included). Includes: 390 parts, 3V electrical motor, 2 real tools and 1 instruction sheet. Takes on even the most daunting terrains powered by the mighty 3V electrical motor! Rebuilds into 25 other cool machines based on the Mountain Rally race theme, including a chase helicopter, an ATV, a pickup and much more! Mountain Rally Racer measures 9.75" long x 5.0" wide x 3.5" tall. Your creations are as big as your imagination! (Credit: Description taken from Amazon)