Description: 【Interactive Assembly】: This wooden track marble toy offers a hands on assembly process that enhances play. Children can manually construct the marble track, fostering creativity and problem solving skills 【Durability】: Made of sturdy wood and glass materials, this children marble run block measures 22.5 x 16.5 cm, compact enough for easy storage while still providing ample space for creative construction 【Inertia Drive】: Watch the marbles use inertia to travel through the track, and this dynamic feature keeps children engaged and entertained 【Skill Development】: Children can cleverly combine these elements to create thrilling marble routes that provide an exciting and stimulating experience 【Interlocking Design】: Educational assembly toy for boys with a slot based connection system, the parts securely to ensure stability during play Specification: Material: Wood Glass Size Chart: 22.5cmx16.5cm/8.86inchx6.50inch Package Includes: 1 Set DIY Children Marble Run Block Toy