They seem to do them by season - I've seen them do a Summer box but I usually order the Fall boxes. When I realize it is going on!
It is one of those things that I catch when I am keeping up on checking my deals blogs - All Things Target or Hip2Save will alert me that they are available.
I have a sister that loves samples, trying new products etc. so this is perfect for her - and I have another dear friend - like a sister that doesn't have a lot of extra $ to indulge herself so I like to send her pampering type things.