Here are some resources and activities I used with my son.

1. Make Viking Jewelry--use four balls of clay. Roll balls into long thin strips, twist strips together to form a bracelet or necklace.
2. Made a shield from cardboard and markers.
3.  Made a model of a Viking longship  (found here at Voyage of Exploration: http://library.thinkquest.org/C001692/  )  Look under "teacher's world: offline lessons."

This BBC site has info on viking villages, views of  a 3D viking village, and you can play a game in which vikings raid a monastery.  http://www.bbc.co.uk/history/ancient/vikings/

At BBC schools you can read info on Vikings, find out if you would make it as a Viking, write a message in ancient runes, and make a Viking timeline. http://www.bbc.co.uk/schools/vikings/index.shtml

A Viking culture sheet can be found here: http://highland.hitcho.com.au/vikingculture.pdf

A biography sheet of Lief Ericcson can be found here. http://highland.hitcho.com.au/ericred.pdf

A biography sheet of Eric the Read can be found here: http://highland.hitcho.com.au/ericred.pdf

Resources:
This site has many links and sheets about Vikings (scroll down to week 4.) http://highland.hitcho.com.au/tog2.htm

Links to many sites which discuss Vikings: http://www.kidsolr.com/history/page2.html

My kids and I have made history notebooks for United History and World History.  These are easy to make and are a great learning tool.  Here's what you need to get started:

You need either a 3 ring binder (1 to 3") and page protectors or
An artist sketchbook (100 pages)--you can find these on sale at Michael's or other craft stores
(We use the artist sketchbook which gives us plenty of room to hold our sheets.)

Glue Stick (regular bottles of glue will make your pages stick together and make the colors run together in your pictures. Or at least this was our experience.)

Pencils
Colored pencils (Colored pencils can do more detailed work than crayons and markers will fade through onto other sheets in your notebook.)

We began by making a title sheet. But you can also print notebook covers here (scroll down for the free ones) http://www.barefootmeandering.com/homeschool/

Now you are ready to begin.

What to include in your notebook--
1) timelines of  civilizations, historical persons, inventions, whatever...
2) maps of civilizations or the land areas they once occupied, maps of expansion, etc.
3) notebook sheets of famous people, events, important inventions, culture information, the history of the civilizations, etc.
4) vocabulary sheets (if you want or you can do these separately)

You can find maps to include in your notebook at Maps For Students: http://www.unc.edu/awmc/mapsforstudents.html

For lots of worksheets, projects, notebooking sheets, etc. to include in your history notebook, this is an excellent site:  http://highland.hitcho.com.au

Have you ever wanted to research a particular decade? Here are some history study suggestions from one of my yahoo groups to give you ideas...

1) Inventions or break throughs in science for that decade
2) Economic changes
3) Fashion changes: Mostly how kids dressed then as compared to now. You could even consider making paper dolls.
4) Travel (most popular places to go) or modes of travel (train, boats, etc).
5) Specific historical events (Titanic sinks, etc. ) You can probably come up with at least one event for each year.
6) Time line: For each block of time you could create a time line
7) Family history: Look up your own families history and find out when people got married, how many children they had, how long they lived, where did they live, what events they lived through (local not global), what did they study in school when they were kids (was it a one room school, new government school or homeschool).
8) World leader: You could do a comparison of US presidents to the rulers of different countries. Or just learn about the leaders of different countries.