Kachi's Marketplace

All categories

Science & STEM

Not available yet

Not available yet as a Kachi original. Approved outbound links stay outside Kachi and do not award Gems.

Not available yet. This category keeps its approved artwork and does not pretend to be a working original.

Outside Kachi

NASA Space Place

Games menu on NASA's own site. Kachi does not host, copy, or embed those games. Opening the site does not award Gems and does not tell us what a child did there.

approved link · NASA · external website · ages 8-12 · free · A guardian approves this before a child can open it. The public page does not link out. Opening it does not award Gems, and Kachi does not know what happened on that site.

Outbound link only. No copy, scrape, rehost, or embed. Artwork on this page is Kachi's.

Scratch starter projects

Scratch's own starter-project help page. Community features are why a guardian decides before a child opens it. Kachi does not host Scratch projects.

parent review · Scratch Foundation · external website · ages 8-16 · free · A guardian approves this before a child can open it. The public page does not link out. Opening it does not award Gems, and Kachi does not know what happened on that site.

Outbound link only. Parent-controlled because of community content. Artwork on this page is Kachi's.

Code.org for students

Code.org's student page on their site. Kachi does not copy lessons or embed the courses.

approved link · Code.org · external website · ages 6-14 · free · A guardian approves this before a child can open it. The public page does not link out. Opening it does not award Gems, and Kachi does not know what happened on that site.

Outbound link only. Their lessons are not part of Kachi. Artwork on this page is Kachi's.

PhET Interactive Simulations

Permission required. No link is published. Simulations are not embedded or packaged.

permission required · University of Colorado Boulder · external website · ages 8-14 · free · No link is published.

Plain-link permission was not confirmed on 2026-11-02. Embed and packaging are refused. Artwork on this page is Kachi's.