B-Beach is too concrete-heavy and slide-oriented for the little guys, but Typhoon Lagoon is a wonder! They love the textures, foliage, and general sensory stimulation. Babies love the Lazy River (like everyone has said), the kiddie area (excellent design), the "junior swimmer" corner of the wave pool, and just playing in the sand.
If you can afford it, you'll love it and so will your little guy.