Does anyone have this toy and recommend it and what size batteries does it need

My son has it and I have never took it out the box

I have it and it's not as cool as the commercial makes it seem. It's not very touch sensitive so you have to touch it with your whole hand for it to go off. But it detects your shadows so you can hover your hand over and it'll make a noise. Idk I don't think it's very fun but this could just be mine. My son's like not interested in it at all unless I play with it lol