Use a deck of cards.  Take turns flipping cards over.  See who can get to 100 first!

Use a deck of cards.  Take turns flipping over two cards at a time.  Add your cards.  The player with the highest sum gets to keep the cards.  Whoever has the most at the end wins!

Write the words "ones, tens and hundreds" on three different bins.  Use 5-10 small balls or beanbags.  Toss into the bins.  At the end figure out what your number is based on the amount in each bin.

Use chalk and make a hopscotch board outside.  Write numbers by 2's, 3's, 5's, or 10's to practice skip counting.

Count a handful of coins.

Tell someone what time it is ten times during the day.  Write the time down.