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Williams Labs
  1. Worlds
  2. Matter Explorers

No. 01Physical science

Matter Explorers

A science treehouse about what things are made of, and how they change.

Four lessons in a treehouse lab: the Properties Workbench, the Build Mat, the Hot & Cold Kitchen and Material Match. Drip, a water droplet, reads everything aloud. There is no typing anywhere.

Join the founding list

Playable here in December.

Matter Explorers Build Mat: a boat shape built from 24 coloured cubes on a green mat, with a card that reads 24 pieces before, 24 pieces after.

No. 01

Matter Explorers

Physical scienceS2P1Grade 2

Standards

The standards it is built to

Georgia Standards of Excellence codes, exactly as written. The topic under each code is our plain-language summary.

What children do

Four lessons, about 20 minutes each

Every lesson follows the same four steps: predict, test, observe, explain.

Drip, a water droplet, reads everything aloud.

  1. Properties WorkbenchS2P1.a

    Test 19 everyday objects with 7 tools: look, squish, bend, drip test, weigh, touch, and pour or move. Sort them, then re-sort the same objects a different way.

  2. Build MatS2P1.b

    24 linking cubes start as a house. Take it apart, predict, then rebuild the same pieces as a boat, a robot or a bridge, or build freely.

  3. Hot & Cold KitchenS2P1.c

    Heat or cool 13 things. Predict whether each change can be changed back, then sort them onto “Can change back” and “Can’t change back”.

  4. Material Match

    Seven jobs, from a raincoat to a soup spoon. Choose a material, and a short test shows why it works or not. This lesson is review.

For the teacher

What you get

  • Show me!: Drip walks the class through a station, with Next, Back and Pause.
  • Teacher Mode, opened by holding the gear for 2 seconds: projector size, sound and narration switches, a lock that keeps the app on one station, and a reset for the class’s progress.
  • Lesson plans for all four lessons, and printable observation sheets.
  • An Explorer Notebook with a black-and-white “Print my notebook page”.
  • A teacher guide comes with it.

No grades are stored. The teacher sees the result on the screen only.

Devices

Where it runs

  • Runs in the browser. Built for classroom Chromebooks and iPads.
  • The whole world is one file of 6.32 MB.

The privacy label

What Matter Explorers does with a child’s information

This label is for this world only. The privacy page has the label for everything we make.

Matter Explorers

There is nowhere to type, and nothing is sent.

Accounts or logins
None
Names
Never askedNo typing anywhere, so there is nowhere to put one.
Sent after the page loads
NothingThe world is one self-contained file. It makes no network request once the page has loaded.
Stored on the device
Progress and stickersClass progress, notebook stickers and badges, and the Teacher Mode settings.
Ads or tracking from Williams Labs
None

Plates

Three more looks inside

Matter Explorers Workbench: a yellow sponge on a plate after a drip test, the water-drop guide with arms raised, and a card saying the sponge absorbs a lot of water.
Matter Explorers Hot and Cold Kitchen: a red toaster-like heater steaming on a counter next to a cloud character, with a card for chocolate showing the guesses It melts and Yes.
Matter Explorers Material Match: a board of jobs with Raincoat selected, water drops falling on a small figure under a blue plastic cover, and a card that reads Testing: Plastic.

Next The founding list

Be one of the first 200 teachers.

The first 200 teachers get the Founding Teacher price, $29 a year instead of $39 a year, locked for life, and a say in what gets built next. Checkout opens in December 2026. Until then, joining the list is one email to us.

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