Winter Venues

We're in the very early stages of planning a "staycation" in March. I'm not sure what we'll do, but the very idea has me excited and counting the days.

What to do, what to do?

March in Maryland is chilly. According to the National Agriculture Statistics Service, the average temperature in March is 44.8 degrees Fahrenheit.

It would be hard to convince Gabe to hike in that weather. So, while I am considering a snow tubing expedition (if there's still snow), I'm thinking more along the line of indoor activities.

My initial list of possibilities looks like this:

B&O Railroad Museum
location: Baltimore, Maryland
cost: $16 adults, $10 children

Bowling
location: varied
cost: ~$9/person with shoe rental

Maryland Science Center
location: Baltimore, Maryland
cost: $16.95 adults, $13.95 children

National Aquarium - Baltimore
location: Baltimore, Maryland
cost: $29.95 adults, $20.95 children

National Aquarium - Washington
location: Washington, DC
cost: $9.95 adults, $4.95 children

National Geographic Museum
location: Washington, DC
cost: $8 adults, $4 children

Rollerskatinglocation: varied
cost: ~$9/person with skate rental

Smithsonian Institute
location: Washington, DC
cost: free
multiple museums: Air and Space, American History, American Indian, Air and Space, Natural History, and more

Snow Tubing
(It's very likely we'd have to drive to West Virginia to find snow at the end of March, but it was worth researching anyway).
locations:
Liberty Mountain Resort, Carroll Valley, PA
Roundtop Mountain Resort, Lewisberry, PA
Whitetail Resort, Mercersburg, PA
Wisp, McHenry, MD (near Deep Creek)
cost: $15-$30/person depending where and when you go

Some of these are the usual suspects - not that there's anything wrong with that - they are tried and true. But I'm open to some new venues - particularly those that are budget-friendly.

Any ideas?