Academics
KnockTots
The phone is a door. Copy the animals' knocks, then make up your family's secret knock: some quick, some slow. Only that knock opens the door. It is kept on this device. Then knock on a real door! Ages 3–5.
▶ Play it nowBuilt for sittings of about 10 minutes on the screen. That is our design budget, not a measurement.
Meet your mentor
Every Spark & Anvil app has a friendly mentor character that demonstrates, asks, and patiently scaffolds learning.
Mentored by Rapsy
#1f5f6b Characters who teach
Meet the cast
KnockTots's friends live behind doors. Rapsy knocks, Hearsy listens, Codewick keeps the family's knock safe, and Toby only opens for the right one.
Rapsy
knocks a pattern of quick and slow knocks
Hearsy
A bat who listens - hears whether each gap was quick or slow
Codewick
A squirrel who keeps the code - remembers the family knock and tells nobody
Toby
A tortoise behind the door - opens it only for the knock that matches
What's inside
Learning goal
The phone is a door. Copy the animals' knocks, then make up your family's secret knock: some quick, some slow. Only that knock opens the door. It is kept on this device. Then knock on a real door! Ages 3–5.
Mentored by Rapsy — no data leaves the device.
How KnockTots handles your kid's data
- ✅ All progress, settings, and AI-generated content stays on the device
- ✅ No analytics, no tracking, no third-party SDKs
- ✅ Free — no ads, no in-app purchases
- ✅ No personal information collected from children — in line with COPPA (updated by the 2026 FTC amendments)
- ✅ No chat with strangers — play-together rooms use a short code and preset emotes, never typed messages