Canva Layout - Problem aligning contents in a canva cell

I’ve been using canva.com for my primary teaching lessons and I’m struggling to get the contents of a Canva grid aligned in a cell.

Any ideas?

https://www.canva.com/design/DAEd4UyTUuk/EbLpXlory2X2e3o-lQ-XEw/view?utm_content=DAEd4UyTUuk&utm_campaign=designshare&utm_medium=link&utm_source=sharebutton&mode=preview


Here is my site Read-Only: LINK
(how to share your site Read-Only link)