Number Fun for the Little One

You've just begun so start with one
And one is half of two
Then two and one, for still more fun will always come to three
Now add one more and you'll have four
Then five is next you see
If you want six, there are no tricks
Try two times three for kicks
Take four from eleven and up jumps seven
The number eight will follow
Next in line nine is fine
And ten will come tomorrow
Now if you take ten from ten
you can start over again
Suddenly you're back to zero
Count up again, you're the hero