The pulley block set features a detailed and realistic design, making it an engaging and interactive learning experience. Students can assemble the crane model, which helps develop their problem-solving skills and creativity. The materials are durable and safe, ensuring long time use in classroom or home settings. Features -Color:Light Yellow -Material:Wood -Size:31.00X10.00X10.00cm/12.18X3.93X3.93in -Note: battery is not included -Interactive learning science kit: engage children in interactive learning with a diy pulley crane, fostering a deeper understanding of mechanical physics -Comprehensive materials science kit: the science kit comes with all the materials needed for various experiments, encouraging creativity and exploration -User friendly science kit: designed for easy diy, this set is suitable for both children and parents to enjoy quality time together -Wooden construction: crafted from wood, the kit ensures safety and longevity, making it a tool -Versatile application: suitable for classroom use or home projects, providing a hands-on kit to learning physics Package list: 4 x set of homemade pulley set