My son(8years) came across one of these in his 3rd cache and now has decided he wants to collect them. So now the family has a new hobby and he is trying to collect these tags. I don't know how popular they are here in Canada but we now have 3 or 4 found in 26 caches. Not to bad but looking at the website for them he will have a lot of hunting a head of him, lol.