Street 05 › Arcade & Skill Lab › Chain Reaction: Untimed
🧨 Chain Reaction: Untimed
The atoms hold still. Preview where your one spark’s blast reaches, plan the cascade, then fire. A missed stage can be tried again on the same layout.
Free to play in your browser: no download and no account needed. The game opens on this page.
- Type
- Puzzle
- Difficulty
- Medium
- Round length
- Untimed
- Ages
- 9+
- Controls
- Tap to preview · Tap inside the ring to fire
What it practises
- Deep reflection & analysis: Slowing down: weighing evidence, spotting weak arguments and explaining why something worked.
- Problem-solving & planning: Planning ahead, switching strategies and working out cause and effect.
- Concepts & theory: The science and maths behind the game: reflection, orbits, waves, circuits, ciphers.
Fast games can crowd out slow thinking, so this skill uses untimed games and written reflection.
Quick lesson: Exponential growth
When every blast sets off more blasts, the count multiplies at each step. Small starts grow very fast.
Check question
Step 1 has one blast. Every blast triggers two in the next step. How many blasts happen in step 5?
- 8
- 10
- 16
- 32
Answer: 16. 1 → 2 → 4 → 8 → 16. Each step doubles, so step 5 has 2⁴ = 16.
More games like this
- Phishing Spotter: Scam or safe? Read each message, then name the detail that gives a scam away. Untimed, with every answer explained.
- Case File: Read the clues and pick the conclusion that really follows, including when the honest answer is “you can’t tell”. Untimed.
- Source Check: Which source would you trust, and what should you check before you share? Funding, evidence, dates and lateral reading. Untimed.
- Data Story: Read a chart and pick the conclusion it really supports. Watch for cut-off axes, tiny samples and links that aren’t causes. Untimed.
- Hypothesis Lab: Design a fair experiment: what to keep the same, what to measure, and why scientists use control groups and blind trials. Untimed.
- Argument Map: Four jumbled sentences from an argument. Find the claim, the evidence, the counter-argument and the reply. Untimed.