A simple but fun activity I made for Owen(3) this morning.  I drew flowers (1-10) on separate sheets then made little number cards.  He had to count the flowers and then find the correct corresponding number and place it in the square at the top of the card.  Then for more practice he would count out the same number of math blocks and put those on the card too.  He enjoyed 1-5 and as I was making 6-10 he moved on to something else.