I have to agree that Jamestown Island in it's current state leaves much to be desired for 'fun', especially if you have already been to Williamsburg. Jamestown Island is a National Park run by the NPS ($8 p/adult last time we went $10 for Jamestown Island/Yorktown Battlefeild combo, both good for 7 days). Although it does show promise when the new museum is complete and if you happen to be there when the archeologists are it's really cool. get the Jr Ranger pack for the kids from the gift shop -$2 There's a few Picnic tables but no grills, parking is sparse, check out the glass blowers when you first enter the island and the veiw of the river is great.
Jamestown Settlement on the other hand is really cool. I haven't yet had a chance to explore the galleries, my girls always want to go straight outside. It's $12 p/adult here and $6(?) for kids (
www.historyisfun.org) Outside starting at the dock are replicas of the 3 ships John Smith & the colonists came over on, the Susan Constant, the Godspeed and the Discovery. You can go on the ships and explore all over them, there are interpreters on each one, as well as some kind of off to the side that will talk to the kids about all manners of ship life, charting courses by the stars and show them how to figure out how many knots the ship is going etc. They've always been great. The Godspeed replica is currently sailing the east coast to promote the 400th anniversary of America and the celebrations that you'll be in time for next year. Just up from the dock are restrooms and the Riverwalk Discovery area. This is the favorite of my oldest. You'll find interpreters showing different things of the Indian and colonists way of life, everything from smoking fish, making nets, scraping and hollowing a canoe, cooking, herbs, farming, it depends on the season, but it's hands on and tons of fun. Up from the Riverwalk discovery area is a recreation of Jamestown Fort. Interpreters abound and will give you a tour of the fort, tell you how thngs worked and every so often (I think on the hour) there's a firearms demonstration. Again, what the interpreters are doing depends on the season. Between the Fort and the museum is the Powhawtan (sp) Indian village. They had to move it from it's previous location due to flooding so it's not set up quite right anymore, but that doesn't make it any less neat to look around and talk to interpreters, learn how to make rope, grind corn, play games etc. Activities vary by season. In April I would guess that you would be finding a lot of planting. Jamestown Settlement does have a cafe. Food is decent quality, not outstanding, but not gross and is priced what you would expect.
Yorktown Battlefeild, Yorktown and Yorktown Victory Center are a short, gorgeous 20-30 min drive down Colonial Parkway. There are lots of pull offs on Colonial Parkway with great picture opportunities and information.
Yorktown Battlefeild & the historic houses of Yorktown are run by the NPS ($5 p/adult $10 combo pass, good for 7 days). You can walk around the battlefeilds for free but you can't go in the museum or any of the historic buildings without paying (You get a bright orange sticker to wear that shows you paid). Jr Ranger program here was $1. Yorktown itself is so neat. It's still an inhabited town with people living in many of the historic buildings so not everything is open to the public. There is a public beach and a gorgeous picnic area overlooking the river. No grills that I remember, but we always brought ours so I didn't really need to notice. Riverwalk Landing is a new area in Yorktown with quaint little shops, a Ben & Jerry's ice cream and an expensive table service place (I think it's reservations only).
Up the hill is Yorktown Victory Center. It's run by the same foundation as Jamestown Settlement so the website is the same. When you first make it through the ticketing area you follow a path down towards the museum that is dotted with informational boards about the revolution before you end up at the museum. Before entering the museum there is a set up of a colonial army camp that you can explore. Don't be afraid to ask the interpreters questions, they are more than willing to share and the answers are usually fascinating. The museum itself is huge and full of really cool artifacts. Downstairs tucked ina corner is a kids room where they can dress up, play, read books and escape the museum if they want. (Must be supervised). Upon exiting the museum you'll walk uphill into a colonial tobacco farm. There are various buildings, chickens, interpreters etc there and also stuff the kids can do to 'help'. From there you can exit through a gate or through the gift shop. Plenty of parking, covered picnic tables and snack machines.
If you have daughters that are Girl Scouts, our council Girl Scouts of Colonial Coast has patch programs designed for the exploration of Jamestown Island, Yorktown Battlefeild and Colonial Williamsburg as well as other cities, towns and historic buildings in the area.
http://www.gsccc.org/Programs_Activities_Patches.asp
Forgot to add - also fun for the kids is the time travelers passport. The program runs from March to October and each year has a different theme. By visiting different museums and historic sites in VA the kids get a stamp on their passport. When you visit 6 and send in your passport you get a certificate deeming you a VA Time Traveler, more than 6 locations earn a gold seal announcing your master traveler status. If at least 2 of the locations you visit are within that years theme you also get a free patch. Last years theme was 'Before 1607', this years theme is 'From Colonists to Countrymen' and with the 400th anniversary next year the theme will proabbly have something to do with that. The website for information and to download the passport is
www.timetravelers.org