Anyone one of some fun things to do with a toddler (2 1/2 yrs) in Md, (baltimore or frederick maybe) DC or VA?

In DC, the Mall can be fun for a little one. The monuments, which have great sculpture, and which little ones can sometimes go up and touch are great (the map of the Navy Memorial, and the soldier which you can go up to, is great - but be careful of the fountains and such).

The National Gallery of Art has a sculpture GArden with a fountain, lots of benches, and a restaurant. Many of the sculptures are whimsical.

Several of the museums have interactive stuff that might be of interest to little ones. The National Museum of Natural History is one, the caveat being that the stuffed animals, dinosaurs and such might be a little intense for such a little one.

Gadsby's tavern in Old Town Alexandria has a regular Toddler and Me session where they play with the toddlers in authentic 18th century ways while parents get a chance to enjoy a cup of tea or something.

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National air and space museum. With all of the planes and aircraft your toddler will amazed. Also the Nat'l air and space museum Udvar Hazy center near Dulles airport in VA is so cool. I havn't been to baltimore but it seems like a very intresting and diverse city.