Prime members only. Amazon has the Prime Surprise Sweets Dash Button, bundled with a $4.99 Credit off first push, for $2.49 - $2.49 off with code SWEET50OFF at checkout = $0 with free shipping (with Prime).

Every time you press it, it will send you a unique box of "small-batch artisan" treats for $18. Might not want to keep it in reach of the children...