The toys, imported directly from China and sold online, do most subject to no control. Now it says "platic hard," hard yes but how for it is not reassuring for even children 6 years and the weight is not indicated. For the safety of your children, I would recommend this product chosen by Amazon, with which my nephews played and is perfectly harmless: Androni - 7909 - Games Outdoor - Boomerang. The brand is European, the product has existed for over 5 years.
