DC sights to see

Places around DC I would like to see and take my kids (in order):

1. Hillwood Estate and Gardens, $12 donation
2. U.S. Botanical Gardens
   
3. Organ recital at National Presbyterian Church
   
4. Mt Vernon (in Virginia)
5. National Arboretum
   
6. National Zoo
   
7. The Mall, esp. the WWII monument
8. The Smithsonian -Air and Space Museum
   
9. Friendship Village - shopping with the kids
   
10. National Cathedral

There are, of course, scores of other places to see in Washington. But this is the short list, esp while I'm working here and Spring is coming.