Hi Blah51,
Allow me to answer the question - Zoo or Legoland?
Since you have a very young child, Legoland fits the bill perfectly since the place is designed for little kids. However, the prices are very steep for everyone.
The Zoo is a beautiful place to go with a young one as well, however, it can be a very long day (like Sea World) because of all the walking. The hand's on activity for your little one can be found at the Children's Zoo where everything is at young peoples' height. This is a more affordable attraction than Legoland.
Once you have the facts, I would ask your child for their input and go from there.
For more information on fun things to do in San Diego, places to go and eat, please join our free online travel guide to San Diego
San Diego Travel Tips | San Diego Local Travel Guide | Visitor Information. We have a family-friendly section as well.
Cheers,
Alex
San Diego Travel Tips | San Diego Local Travel Guide | Visitor Information