EASY TO INSTALL: Came with step-by-step instructions perfectly adapted to the model. LIGHT SET can be hidden inside the building block set and makes the whole model so appealing. After the assembled put the model in the dark next open the switch and the model will emit beautiful and charming lights. Manufacturered by Lingxuinfo. PERFECT GIFT: Ideal gift for your or kids favorite building block. Birthday Christmas family gatherings gift. TIPS: Please install your led light carefully no hard pulling and no need to bend or shake it. LED LIGHTING KIT: Use to light up your building block model (NOT include the Lego Set).