Science and technology small production homemade hand-cranked bubble machine elementary school science experiment toy stem toy science

Material: Plastic/Plastic. Place of Origin: Mainland China. Brand: Tanmeng. Packing method: net bag. Ability training: emotion, vision, intellectual development, manual brain, grasping, sensory, hand-eye coordination, other ability training, interactive toys, hearing, parent-child communication, interest training. Item No. Hand Bubble Machine. 3C configuration category: similar stationery toys under 14 years old. Specification: 9075132mm. Applicable age: Juvenile 7-14 years old. Product name: hand bubble machineProduct size: 9075132mmDescription: Each set of hand-cranked bubble machine provides 2 packs of bubble liquid. The design has been improved many times and the installation is reliable. This design is to prolong the consumption of bubble liquid. It uses 2 batteries as power source, selects an appropriate blower motor, and hand cranks the bubble ring, which can play for a long time. Product introduction: The self-made bubble machine uses the principle of surface tension. When