STEM
BoneTots
Bones for ages 3–5: build a skeleton — tap a bone, tap where it goes, and each bone tells you its job. Then find out how big it is, measured in YOU! Dinosaurs, herons, catfish, and you. Slow and calm; on-device.
#a16207 Distributed-narrative cast
Meet the cast
BoneTots's little cast each keep one bone and its job; Marrow the friendly skeleton knows every bone has a task — and that even a giant T. rex can be measured in kids.
Marrow
(Guide) the friendly skeleton — every bone has a job, and everything can be measured in YOU
Cranny
The skull — keeps the brain safe (structure protects function)
Spine
The backbone — a stack of little bones so the body can bend and stand tall
Cagey
The ribs — a cage that keeps the heart and lungs safe
What's inside
Learning goal
Bones for ages 3–5: build a skeleton — tap a bone, tap where it goes, and each bone tells you its job. Then find out how big it is, measured in YOU! Dinosaurs, herons, catfish, and you. Slow and calm; on-device.
Question kits
16 curriculum-aligned kits × 25 questions = 400 questions per app, mapped to recognized standards.
On-device AI mentor
FoundationModels-powered hints, feedback, and adaptive difficulty — all running locally.
Mentored by Marrow — on-device AI, no data leaves the device.
How BoneTots handles your kid's data
- ✅ All progress, settings, and AI-generated content stays on the device
- ✅ No analytics, no tracking, no third-party SDKs
- ✅ No ads, no in-app purchases — you pay once
- ✅ COPPA compliant under the 2026 FTC amendments
- ✅ Parental controls + session limits + content filters built in
BoneTots runs on ForgeKit — the open-source Swift Package Manager framework that powers every Spark & Anvil app. ForgeKit ensures consistent accessibility, COPPA compliance, and design language across the portfolio, so your kid's progress and preferences feel coherent across every app they touch.
Coming to the App Store
BoneTots is in active development. Email us to hear when it ships — no marketing, no spam, just a one-shot launch announcement.
Email me at launch