"The kids (ages 6-10) at our Halloween party loved these necklaces, especially the 6 and 7 year olds. This was the first thing most of the kids wanted to do. Wish I had ordered more sand projects because it was a favorite. The caps stayed on, which was a concern of mine. However, several came untied and fell, which resulted in a crack. Not really a flaw of the product, but just be sure the necklaces are tied securely because they will break if dropped. Of course, out of nearly 40 necklaces, only 3 broke."