DIY LED Flashing Light Electronic Building Blocks

Overview: 1. The outer plastic is insulation material, inside is a built-in circuit board. When the building block is assembled on the bottom board, it will light up at once 2. Built-in LED light shines through plastic, it' s colorful and soft Specifications Material: Plastic Size: 12.5×22×4.5CM Weight: 1.25KG Package Content: 1 x Building Blocks