1It can improve handeye coordination, fine motor skills and problemsolving skills. 2USB charging design can be used indoors or outdoors, bringing good memories to children. 3Large amount of bubbles, onebutton electric generate bubble, no need to blow bubbles with your mouth. 4With a lanyard, children can hang directly around their necks for easy play. 5Made of highquality material, nontoxic and harmless, it can be used for a long time.