There are a number of names for the balls - generally they are called zorbing balls or OGOs.
because they are
balls with holes were invented in 1953 and were dubbed "Wiffle Balls."
NO. Depending on the type of they will either have a reactive core inside or a solid plastic core.
The big inflatable balls that you can climb into and roll down a hill are called Zorbs. This activity is known as zorbing, globe riding, or sphering.
No, beach balls are made out of plastic.
Plastic.
Most hockey balls are made of plastic with a hollow centre, or a cork centre surrounded with a plastic shell. If you ask because you hear it rattling; part of the inside has spalled (a small piece has come off the inside due to the shock of a hit, and is free to move), and should probably be replaced.
You get fabric or a cloth and put beans inside then sew it together!
stamen, they produce pollen to fertilize ovaries
You can buy 2 to 3 inch hollow plastic balls at www.complexplastics.com/BALLS/balls3of3.htm. Another good website is www.complast.com/balls/
The property that separates styrofoam balls is their buoyancy. Styrofoam balls are lightweight and have air trapped inside, making them less dense than water. This causes them to float on the surface of water, separating them from denser materials that sink.
It would depend on what kind of hollow plastic balls you are looking to buy. If you are looking for CLEAR plastic balls, www.tradekey.com may be your best, cheapest solution. Alternatively, cicball.thomasnet.com would be ideal if you are looking for Polypropylene Hollow Balls. Lastly, www.craigballsales.com would be a great alternative. I hope this answers your question, and good luck!! Environmental Controls Company manufactures hollow plastic balls as bird deterrents and algae control. Their website is eccllc.us. I believe this hits the nail on the head, consult this for hollow plastic balls. http://www.cicball.com/