Because I don't, and it's making me uneasy! I must be doing something wrong if there aren't boxes coming to my house on a daily basis in July.
I really only need handwriting books and art supplies for my youngers, maybe SM for my DD because she wants that instead of MM, but I haven't decided. Everything else is already sitting on my shelves! (Or on my hard drive)
DS 10 just needs a pile of books, most of which I can get from thrift books. He's doing BYL grade 8 in the mornings and music and art in the afternoon. (I may buy an MCT level for second semester, but this is still way less than I usually spend.)
We are signed up for some subscription things, so I'm not spending nothing, but there's no large chunk of change coming out of the budget this summer.
(I hope I didn't just jinx myself!)