kinetic spinning desk toy ball, metal stress ball for adults anxiety, adhd optical illusion fidget spinner toys for office for adults (gold) anbo spinning desk toys for adults office stress relief when you are thinking about a project,composing an email or conference calls, spinning it can make you feel surprisingly relaxed and enhance your focus. adhd fidget spinner kinetic ball for kids it's a great gift for your kids who fidgets while doing homework. it can helps him or her concentrate questions and answers q1:how big are these? we have 3 size, 39mm/45mm/55mm and each size have 5 colors (black/gold/rose gold/silver/blue) q2:how long does it spin? about 2-3 minutes, great spinning toys for kids and adults q3:is this metal? yes, a great stress relieving toys q4:is it safe for kids?is the metal hard enough to injure them or break glass? the part's do not come apart easily, so it's safe in that regard. it will probably break glass and it could injure them if it's also thrown. it's meant to be a desk toy just to spin around q5:does is stick on the desk or can you move it? it doesn't sitck on any surfaces, you can move it q6:does this desk toy ball make noise when you spin it? no, it's quite,it's so tantalizing when you're stressed or cannot do anything about a situation.