PayPal Payment Forms Not Appearing

You have a whole bunch of JavaScript errors on that page, which is why the form is not appearing. Fix these errors and check again to see if your form appears.

Timestamp: 1/25/13 5:21:13 PM
Error: TypeError: b.browser is undefined
Source File: http://www.nurturingdevelopment.com/wp-content/plugins/jquery-lightbox-for-native-galleries/colorbox/jquery.colorbox-min.js?ver=1.3.14
Line: 4

Timestamp: 1/25/13 5:21:13 PM
Error: TypeError: b.browser is undefined
Source File: http://www.nurturingdevelopment.com/wp-content/plugins/fancybox-for-wordpress/fancybox/jquery.fancybox.js?ver=1.3.4
Line: 18

Timestamp: 1/25/13 5:21:13 PM
Error: SyntaxError: syntax error
Source File: http://www.nurturingdevelopment.com/contact-us/make-a-payment-ndla-ii/
Line: 148, Column: 10
Source Code:
 'width': , 

Timestamp: 1/25/13 5:21:13 PM
Error: TypeError: $(...).colorbox is not a function
Source File: http://www.nurturingdevelopment.com/wp-content/themes/peekaboo_110/js/p2.js?ver=3.5.1
Line: 24

Two of the errors are from plugins and one if from the theme.

Also, it looks like you are loading jQuery latest rather than the included 1.8.3 version which would be enqueued by WordPress 3.5.1. Here is the line where it's included:

<script type='text/javascript' src='http://code.jquery.com/jquery-latest.pack.js?ver=3.5.1'></script>

It's possible if you remove that version and let WordPress do its job of enqueuing jQuery 1.8.3, your JavaScript errors might be taken care of.