There are wind up toys, not battery-operated. The robot toys will be interesting and amusing, start to dance, nice for shaking their hip when they are . you will yourself pleasant and relaxed if you are unhappy or pressured. They will be good developmental toy for kids, as well as a funny object for adults. Features -Color: color -Material: Plastic -Size: 9.00X5.50X3.00cm/3.54X2.16X1.18 in. - Help improve coordination imaginative skills and parent-child , easy for little hands to hold. - the clockwork, no battery required, with clockwork design, the robot toy will act and dance, funny to play. - Not only can be used as a wind up toy, also can be used as a home decoration to add more points to the house. - Safe, will not hurt your baby or children, smooth and comfortable for holding, portable to carry. - Send it to your kids, families, friends as a creative and perfect birthday gift, Christmas gift and more. Package list: 4 x wind up toys