Very first thought was a hoola-hoop
Game of Life
Yachtzee
Bingo (Five Below has cool ones)
PUZZLES, we put up a card table Chiistmas afternoon and start a rather large puzzle that we work at on & off throughout the holiday week thru New Years. With the kids out of school all week it is fun. Plus I have a lot of one-on-one time as I often end up doing the puzzle with one kid at a time. It just works out that way.
Paint by Number kits
Play Dough, for ALL ages
Wooden blocks, for ALL ages
Jenga
Fun Playing Cards, like Disney Cars or Princesses to play FISH or Crazy Eights
Target/MIchaels have some fun kits to make bird houses, model cars, etc out of wood.
Children Cookbooks. They kids can plam, prepare and help cook meals for Friday nigh family buffets. We usually do this on New Years Eve.
Depending on ages, last year DD got one of those inexpensive cardboard playhouses that you can color. Everyone had fun coloring it and playing in it. Even the older boys played with her. She slept in it during Christmas break.
Chess, everyone of the kids have learned to play. Yes, it takes time to learn and it get better at it, but it is fun overall.
Inexpensive camera with a good photo shop program is fun too. The girls love making digital scrapbooks and the boys even have fun doing fun things to their photos.