101 Ways to have fun with your kids.
Here are a few ideas from the website:
Make a fort
Go on a hike (or a walk!)
Picnic
Board Games
Have a fun Breakfast!
Have a Scavenger Hunt
Build a Sandcastle
Bake cookies
Go to the Library
Decorate their room
B B Q
Donate to charity
Have a Campfire & sleep in a tent
Dance
Blow Bubbles
Sing
Play with Legos, Blocks, Barbies, etc
Dress up
Pick Flowers
Read
Cuddle & Watch a Movie