Design a connected fridge for school kids and busy parents

Design a connected home refrigerator specifically for elementary school children and their busy parents.

Context

Kids snack unsupervised after school; parents worry about junk food and wasted groceries. Smart fridges exist but are built for adults and are expensive.

Clarifying questions to ask first

New fridge or add-on device?
Price point?
Age range of children and reading ability?

How to approach it

Clarify the business goal and tie the product to the company's mission before touching solutions
Segment users by behaviour or need (not just age), cover the whole ecosystem, and pick one segment with explicit criteria
Walk the end-to-end journey and separate real pain points from feature requests
Brainstorm a range of solutions (quick fix, data/ML, moonshot) and prioritise with impact vs effort
Define a North Star, funnel metrics and guardrails, then call out risks, edge cases and mitigations

Framework: Goal & mission -> Ecosystem & segment choice -> Journey & pain points -> Solutions & prioritisation -> Metrics & guardrails -> Risks & edge cases

Sample answer

Children (pre-readers vs readers) and parents (working, at-home)
Kids need picture-based, playful cues; parents want control from their phone
Cameras and data about children raise privacy concerns

Journey: kid comes home > opens fridge > picks snack > parent knows
Solutions: kid zone with lit, picture-labelled healthy picks, parent app to set snack rules, low-stock alerts
Metrics: North Star = share of after-school snacks from the healthy zone; guardrails = parent app opt-outs, energy use

A kid-friendly snack zone with picture cues and parent-set rules, plus restock alerts. Measure healthy-snack share, guarded by opt-outs.

What interviewers look for

Two-sided users (child and parent)
Hardware constraints
Child safety and privacy
Simple vs smart trade-offs