Do you have any good ideas for household item uses?

When I was in college, I volunteered at local preschools as part of my course requirements to become a teacher. One thing I found useful was using plastic beads for classification (sorting). You can get a huge assortment bag at Michael's or Hobby Lobby very cheap. Each bag usually contains many different shapes, colors, sizes, etc. There are at least 3 ways to classify a big bag of beads. You could do the same with buttons, but also classify by number and type of holes.

Another idea dealing with measurement--use the kids! To measure long hallways, I had the children lay head-to-toe from the beginning of the hall to the end. We measured lengths of many hallways, using four-year-olds as the unit of measurement.

You could also use something like sticks of dry spaghetti, pens and pencils, or their feet to measure shorter things,

For science, allow them to experiment with different types of white powder (corn starch, flour, sugar, salt, baking soda, etc--as long as they're edible)--just place them in empty egg cartons. Have a group discussion on how they are the same and different. Compare their color and texture. Mix them with water and vinegar to see how they'll react differently.

I can probably come up with more if you need some or if these don't work--just let me know.

You could measure water. Have them pour from a pitcher into a cup to see how much water there is.