Here is a simple Number recognition game you can play with your toddler.
Write the numbers on a paper.
If you own a Dot-a-dot marker, let the little champ 'dot' the numbers as you call them out.
I have seen other bloggers using this same activity for word recognition games too. If you don't have the markers, you can always use stickers instead or paints or stamps- plenty of other stuff you can use!