Features 1、Puzzle Model: This set of 3D wooden puzzles will enhance children basic scientific knowledge, improve hands on ability and imagination, stimulate interest and curiosity 2、Type C Charging Interface: This DIY humidifier model has a Type C charging interface, which can be directly used by plugging into the Type C interface with a charger or power bank 3、Timing Function: The DIY humidifier has timing function, which can automatically shut down within two hours to prevent dry burning, safe and reliable 4、Smoothly Surface: This DIY humidifier kit is made of composite wood with smoothly surface, keep your kids safe while assembling these wooden puzzle toys 5、Suitable for: This professional DIY wooden humidifier model is suitable for children aged 6 to 14 years, as well as DIY project lovers Specification Item Type: DIY Wooden Humidifier Model Material: Composite Wood Usage: Hand made, Puzzle Teaching Paint Material: Wood Without Paint Charging Interface: Type C Interface Power Supply: 3 x AA battery required (shipped without battery), can also use the charger and power bank to plug into the Type C interface to charge Package List 3 x Wooden Board 1 x Battery Box 1 x Bottle 1 x Atomizing Sheet 10 x Long Screw 15 x Medium Screw 3 x Short Screw 1 x Water Absorbing Rod 1 x Circuit Board 1 x Screwdriver