My EGG related Humpty Dumpty books were all purchased through Amazon.com
Teaching in general is not a high-paying profession; but money is not what made you KNOW you wanted to teach.
For that reason, once you have chosen a 'theme' (EGGS for example), I suggest you begin purchasing items related to your theme and storing them in those big plastic containers with lids (the kind sold at Wal-Mart).
Next, if you have a large table in your room, make a 'tablecloth' which hides the containers you store underneath. You've just killed two birds with one stone!---ew, that doesn't sound good coming from an EGG lover.
The illustrations make this book a hoot!
Did you know Humpty had a sister? Me neither!