Lots of great suggestions.
This isn't specifically what you asked for..... Although we do own manipulatives, I also like to think of real life activities that naturally incorporate math skills.
Here are some ideas;
*Create a monthly calendar- (year, months, days of the week, no. of days in each month, counting days to an event/holiday, keep track of weather and temp.)http://www.dltk-cards.com/calendar/
* Discuss time (routines, TV shows, what time Dad comes home, we'll be leaving in x amount of time)http://home.howstuffworks.com/paper-clocks.htm
*Track the kids' growth by keeping a visible growth chart and having a scale.
(use butcher paper, masking tape, cash register tape)
*Piggy banks- include the kids in the planning of their and your purchases (find sales, cut coupons, compare prices, count money)
*Cooking (measuring, temperature to set on oven, using a timer/the clock, dividing in fractions, shapes, .....)
* Playing board games or sports (keeping score- numbers, tally marks)
More schooly type----
*Keep a simple timeline (or make a scrap book that includes dates)http://www.socialstudiesforkids.com/...atimeline1.htm
* Make a number line and tape to the floor- let them write one number in daily, see how far they can jump or tape it up on the wall.
*Make "hundreds charts" (use counters (beans, paper clips, etc.) to count by 1s, 2s, 5s, 10shttp://math.about.com/od/countin1/ss/100s-chart_2.htm