With 216 balls you can make hundreds of amazing shapes: geometric shapes, animals, as well as jewellery, such as necklaces or bracelets. This is a great way to keep your kids creative.  Each of the 216 balls measures 5mm in diameter, but in spite of their size, these are rather strong magnets. Great For Brain Stimulation: - Improve your creativity and imagination. - Great for fidget hands, stress relief and against depression. Warning: - Keep away from smaller children. - This product contains small parts. - Age recommendation is 14 years +