Item Type: DIY Circuit Kit Material: Plastic Color: As shown in the picture Card Slot Size: Approx. 10.6x7.8cm / 4.2x3.1in Weight: Approx.225g/7.9oz Applicable Age: Over 5 years old Ability Development: Intellectual development Experiment Type: Physics Package List 4 x Card Slot 4 x Battery Compartment 1 x Bag of Accessories(40pcs) 1. Please allow 12in error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.3. Please note that the color of this product will be sent randomly, and make sure you will not mind before ordering. 1A great DIY educational toy, suitable for children and students to gain a sense of accomplishment and learning knowledge in the entertainment process. 2Excellent handeye coordination and concentration toys can help them think, increase creativity and interest in learning. 3The detachable teaching equipment makes teaching simple, so that children's classrooms are no longer boring. 4Children can learn some scientific knowledge while playing, expand scientific knowledge and promote children's intellectual development. 5Free assembly, exercise children's hands-on ability, understand the knowledge of simple electronic original accessories.