Here's an activity idea for Unicorn School (see post below) that seems too simple to work, but did.
I'm sure all of you have a basket or bin of odds and ends. We have a few. I pulled one out for this activity, and also found some felt numbers I have from a felt set purchased at a teacher store. If you don't have felt numbers, write the numbers 1-10 on squares of paper. Or higher numbers, if your kids are older.
Have the kids take turns counting out items from the bins to correspond to your numbers.
Our bins of odds and ends was running low, so S counted out 5 ponies and lined them up. You could also not use a bin of things, just have them draw a number, and find that number of things in the room or the house (5 squares of toilet paper? 1 big yellow dog?)