Sid is special, even for a wizard. Harry Potter AU.

Geno loves kids, but not the way Sid loves kids. Sid has a younger sister; Geno lived with Seryozha and Ksenia and Natalie for two years. Which is to say, he survived potty training and checkers and temper tantrums, as well as several toddler ballet recitals. Every time they work with the Little Penguins, it's like Sid is fresh off a thorough Obliviation. Geno, meanwhile, is prepared for war.