This is due to CSS styling applied to standard HTML form elements within your current WordPress theme at https://feedingkids.tv/wp-content/themes/flex/style.css
Main problem is area is:
input, textarea, select {
border: 0 none;
etc.
}
Change to:
input, textarea, select {
border: 1px;
etc.
}
Use Firebug or Chrome Dev Tools to first understand and then change the CSS used for your CF7 form elements.
Also good idea to target CSS classes & ids used within your CF7 forms only, so that your CSS changes don’t inadvertantly effect other elements on your website.
See Styling Contact Form for a general explanation of styling CF7 forms using CSS. If you are not familiar with CSS, this page also includes some links to where you can learn CSS.