10-in-1/18 in-1 building set with 109 pieces to create 10 different models including bulldozer, rotary crane, plane, robot, helicopter, racing car and Utv car. Includes step-by-step guide booklet for easy assembly. Electric powered feature adds excitement to creations, requires 2 Aa batteries. Hands-on Stem toy for ages 5+ that fosters imagination, creativity and enhances Science, Technology, Engineering and Math skills. Building blocks encourage family teamwork and interactive play. Easy to wash with sturdy storage box for convenient cleanup. Bright colorful pieces made safe for children. Great for classroom activities and hours of fun. weight: 2.42 pounds