Learning is a bench,
not a feed.
The free beta is open with three playable tracks now: Web Starter Adventure, Memory Enhancing Games, and Rust. No card is required. Other worlds stay hidden until they actually run.
Age sits on the learner. Parent consent covers ages 3–18.
Fig. 1 — Zacai
the tutor, at rest
The only round thing on this bench. Everything else is ruled.
02Age profiles
One starter. Five age bands.
Age controls consent and the age-band teaching guidance attached to each launch quest. The verified activities and server pass gates stay the same for every learner.
3–5
Play & Discover
Short-word guidance and parent-consent safeguards.
6–10
Build & Explore
Concrete examples, smaller answer steps, and repetition.
11–14
Create & Automate
Clear definitions, short-answer reasoning, and guided retries.
15–18
Engineer & Launch
Direct explanations and more independent pacing.
19–99
Accelerate & Apply
Efficient wording without child-directed teaching copy.
03How a lesson runs
Play it, then mark it. Notes stay closed.
Work the bench
A lesson opens on a thing to do: a short watch, a live lab, a memory round, or a graded check. Notes stay closed until you miss.
Read the board
Stuck? Open the notes. One idea, written plainly, at the reading level you actually have. No textbook dump before you play.
Get it marked
Pass the server-graded activities and the module is stamped. Opening a lesson or starting an attempt awards nothing.
The tutor is not available yet. Lessons still grade on the server without it.
04Available and in build
Three tracks now. The rest stay hidden.
Available means a learner can enter and complete it now. Stub worlds stay hidden until they actually run.
Web Starter Adventure
Three graded starter modules
Memory Enhancing Games
Recall, pattern, focus
Rust
Three graded modules: ownership, types, and the gate trial
05Begin
Sit down at the bench.
Tell Zacai the learner's age, create a free account, and begin the first verified module. No card is required.