STEM
Who Steps Up?
Today's Call: five mixed problems, each with no label. Before you solve one, choose who to call: Tock for a steady beat, Inchy for the same unit end to end, Stax to stack and compare. Choosing the method is part of the answer. Ages 6–8.
▶ Play it nowBuilt for sittings of about 15 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.
#0f2645 Characters who teach
Meet the cast
Who Steps Up? has two friends who ask before they measure. Hollerby asks who steps up, and Pennywhistle learns to look before she calls.
Hollerby
(Host, a goose) - calls out each problem and asks who steps up before anyone starts
Pennywhistle
A kitten - used to call the first helper she saw, and now looks at the problem first
What's inside
Learning goal
Today's Call: five mixed problems, each with no label. Before you solve one, choose who to call: Tock for a steady beat, Inchy for the same unit end to end, Stax to stack and compare. Choosing the method is part of the answer. Ages 6–8.
How Who Steps Up? 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