All parents think their babies rock. But when a company says its product will help a kid master reading Harry Potter during the potty-training years, it needs solid science to support those claims. The FTC says Dr. Robert Titzer and his company, Infant Learning, Inc., deceived consumers with ads for Your Baby Can Read, a set of DVDs, books and word cards that cost around $200. These ads and other promotional materials promoted the program’s ability to teach babies as young as nine months to read — with their skills advancing to books like Charlotte’s Web by ages three or four.