Hello,

Please add the below given CSS by going to, Admin Panel > Appearance > Customize > Additional CSS

.page-id-18551 article .entry-content  {
    background-color: #70CEE5 !important;
    padding: 30px;
    border-radius: 50px;
}

.page-id-18554 article .entry-content  {
    background-color: #70CEE5 !important;
    padding: 30px;
    border-radius: 50px;
}

Hope this helps,

Regards!!

Hello,

Glad we could help you.

If you have any issue further please let us know.

Also, we would really appreciate if you could help us by rating our plugin by following the link given below:

https://wordpress.org/support/theme/kids-education/reviews/

Thank you.