30 Riddles and Brain Teasers for Kids - print them from the post. Great for car trips, lunch boxes, etc.
Paint for kids 1 cup of salt 1 cup of flour food coloring and that's it
this site has really hilarious game ideas for adults and kids. they can be used for birthdays or just a fun game night. love it! For Christmas Day :)
Melted crayons: All of those leftover crayon bits become great end-of-year gifts for the kids (not to mention good busywork having them remove the paper).