Digital ad to Parent Funnel

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This customer received 19 banner ad designs from 6 designers. They chose this banner ad design from MediaProductionArt as the winning design.
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Banner Ad Design Brief
That Science Fairy works with preschoolers (also ages 2-8) doing hands-on activities that are Science Tech Engineering and Math (STEM) as a service business. The design is subtly colorful with the attached swatch definitions. Hexagons are a theme on the website.
www.thatsciencefairy.com
The purpose is on social media with a call to action to a landing page. I'd like placeholder text so I can be the copywriter. The banner I see is vertical, longer than wider. Design elements are welcoming, cheerful, and concrete. Pictures included are thematic for reference
https://www.pinterest.com/sciencefairyCO/website-mood-board/
I'd like fonts that are more used than Dosis, which has a child-like font but doesn't render well online. Versatile design desired for deferring ad sizes, if possible. My laptop has InDesign.
Thanks!
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