Hand-Knit Baby Rattles, Best Holiday Gifts For Baby. Estella hand-knit baby rattles are back, just in time for the holidays. Our most popular baby rattles are back in stock, the metro-card rattle – an absolute necessity for any City baby, and the purse rattle, where would she put her metro-card if she didn’t have the purse. And of course, we have the taxi, the football, the firetruck, and the baseball. A darling of the press, these hand-knit rattles are unique and bursting with character.