Autism Speaks, the nation’s largest autism science and advocacy organization, is teaming up with Neiman Marcus (The Westchester, White Plains, (914) 428-2000) during April with the Blue Garden Candle, a delightful mix of blue hydrangea, hyacinth, and forget-me-nots. Each candle represents a pledge for progress; proceeds will benefit Autism Speaks as it works for a cure to this disorder, now diagnosed in one of every 110 American children. From luxury home fragrance manufacturer NEST Fragrances, $32.