What is Hoppi Box?. Hoppi Box is a quarterly toy subscription company that delivers an expert-curated assortment of high quality toys that support your little one’s development, curiosity and imagination. Each box is especially tailored to your baby’s age and developmental milestone. Nuture your baby’s development from day one. Tailored to your baby’s developmental milestones. Curated by child development experts. High quality, natural, eco-friendly and sustainable toys. Free shipping.