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Made with Figma Design + Sites

© 2025 Sarina Katznelson

Hum Kids

Making brushing fun with gamification and Alternate Reality

Overview

Hum Kids is a mobile app paired with a connected toothbrush that helps make brushing fun for kids and enables parents to track their brushing habits. As the lead UX Designer, I focused on enhancing the existing UX for features such as the parent dashboard, while also researching and introducing new features, including the brush timer and missions. I spearheaded the first usability test with kids for the team, considering our limited budget. I worked closely with the graphics team and the development team, based in France, especially when translating designs into the Unity platform.

Role

Lead UX Designer and Researcher

Duration

April - December 2022 (8 months)

Team

UX Design Intern, Development team, Graphics team, Product team (France)

Missions Feature

One of the features I researched and designed from start to finish was the Missions feature. The purpose was to introduce a new form of gamification and rewards to motivate kids to brush more. I conducted background and competitive analysis, sketched and created lo-fi designs, held a design critiques and created a mid-fi prototype, and usability tested with two kids. I worked closely with the development and graphic design teams to reach the final designs and development of the feature.

Missions Feature Final Design

Learn More

If you'd like to learn more about this project, please contact me at sarina.katznelson@gmail.com.

Thank you for reading.

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Made with Figma Design + Sites

© 2025 Sarina Katznelson

Hum Kids

Making brushing fun with gamification and Alternate Reality

Overview

Hum Kids is a mobile app paired with a connected toothbrush that helps make brushing fun for kids and enables parents to track their brushing habits. As the lead UX Designer, I focused on enhancing the existing UX for features such as the parent dashboard, while also researching and introducing new features, including the brush timer and missions. I spearheaded the first usability test with kids for the team, considering our limited budget. I worked closely with the graphics team and the development team, based in France, especially when translating designs into the Unity platform.

Role

Lead UX Designer and Researcher

Duration

April - December 2022 (8 months)

Team

UX Design Intern, Development team, Graphics team, Product team (France)

Missions Feature

One of the features I researched and designed from start to finish was the Missions feature. The purpose was to introduce a new form of gamification and rewards to motivate kids to brush more. I conducted background and competitive analysis, sketched and created lo-fi designs, held a design critiques and created a mid-fi prototype, and usability tested with two kids. I worked closely with the development and graphic design teams to reach the final designs and development of the feature.

Missions Feature Final Design

Learn More

If you'd like to learn more about this project, please contact me at sarina.katznelson@gmail.com.

Thank you for reading.

Previous Case Study

Next Case Study