1 to 20 to 1

1   1, 3, 5, 7, 9
2   I'm a Circle
3   A Pair of Shoes
4   A Counting Star
5   A Mouse Is Smaller Than a Dog
6   Ten Fat Sausages
7   Putting Things in Order
8   A Square
9   Ten in the Bed
10   Two Little Frogs
11   Seven Days
12   1 to 10 and Back Again
13   Lean Forwards Lean Backwards
14   2, 4, 6, 8, 10
15   1, 2, 3, Triangle
16   Fill It Up
17   Plus 1
18   1 to 19
19   1 to 20 to 1
20   2, 4, 6, 8, 10, 12, 14, 16, 18, 20