Any advice or ideas for fun activities or things I can do with my 4 year old son?

Walking, playing at the public park

Sing with him, read books with him, create things out of your recycling, visit your local library together.

Check out gocitykids.com if you live near a big city.

Make a city out of cereal boxes, with roads so he can use matchbox cars.
Check out Family Fun for lots of great crafts and ideas.
Play math games, involving sorting and counting, putting things in sets and groupings. (Buttons are good for this.)
Draw a map of your neighborhood on a big piece of posterboard, and let him draw the houses and the people who live there.
Homemade playdough is always fun.
Make a small stage out of a box, and make stick puppets. Take turns telling stories.

Get messy with finger paints.
Use cookie cutters with play dough.
I Spy children’s books are fun.
Visit your local library.
Bubbles. You can never go wrong with bubbles.

Start him on a hobby, a hobby that is not only fun but stimulates his mind. When my little one was about 5, I introduced her to the hobby of tropical fish keeping. Owning and caring for a small to medium tank of guppies or other fish is a very engaging and intriguing hobby for a youngster. It teaches a child to care for other living things, and develops a sense of humane-ness and a compassion for nature. You can take your child to the library and research different kinds of tropical fish to keep, and in doing so the child will learn a lot from looking at books as his interest grows and his English skills will develop too. The reason why I chose tropical fish keeping for my child is because it’s a “peaceful, neutral” kind of hobby.

Watch educational shows with him and then build models of things he saw.

Treasure hunts are always fun. Make up some clues that lead him through the house or yard until he finds the treasure. It doesn’t have to be a major prize either; chocolate coins or plastic dinosaurs are good.

Poisson Rouge is an excellent website for small children.

Cookery is good, especially making cakes and tarts.

Rough and tumble is always fun.

My five year old loves to play “Made Up Animals”, in which we take turns to describe fantastic imaginary animals and the other has to guess the name.

Arts and crafts, especially potato-printing.

Where are you located, in general?

Here’s a site that has a whole bunch of home made “play-dough” recipes and other crafts.

You could go on a treasure hunt looking for acorns, pinecones and stones to make little crafts with. You could glue the acorns onto a frame (to give as a gift to daddy or grandma), you can paint the stones with funny faces or animals, and you can use glitter glue on the pinecones to make pretty Xmas decorations.

You can make holiday cards or door hangers (use a hole punch to make 2 holes in the top section of your paper decoration and then loop a ribbon through the holes and tie the end in a bow. Use construction paper and glitter glue to make the cards or door hangers.

Here’s a site that has lots of kid friendly recipes to make with mom

Because Thanks giving is coming (I’m just guessing that you live in the U.S.) so you can make turkeys out of the outline of your son’s hand and then color them and give them as gifts or use them as place markers at your dinner table.

You can take a walk around the neighborhood or the park, then you can think up something and ask your son to see how many of them he can spot (birds, pinecones, people with yellow shirts, white dogs etc.)

@MissAusten’s going to have something really great. But then, she always does! :D

Making a fort out of blankets and the furniture within the house could be fun.