The VEX Robotics Hexcalator is a great toy for kids aged 8 and up. It's perfect for home or classroom learning. You can build it with over 260 snap - together pieces, and it doesn't need batteries. You can use it to teach kids STEM principles in a fun way. It features two alternate builds, and all its construction pieces are compatible with educational VEX IQ pieces. The machine is powered by a hand - crank or an optional motor kit. There's no specific information about size and weight, but it's easy to handle and enjoy building.