What Tessik is, and why it's a calm place to leave your kid.
Tessik is a gentle building game for kids roughly 6–14. You explore a bright world made of crystal blocks and build whatever you can imagine — towers, castles, hideouts. That's the whole game. There's no timer, no score to chase, no way to lose, and no one to compete against.
We built Tessik so a parent doesn't have to hover. It runs right in the browser and:
There is nothing in the game that asks a child for money, for personal details, or to talk to a stranger — because none of those things exist in it.
Tessik does not ask for, or store, your child's name, age, email, location, photos, or any other personal information. There is no account to create and no form to fill in.
Your child's built worlds and settings are saved on your own device, in the browser, so they're there next time. That saved data stays on the device — it isn't sent to us or to anyone else, and clearing your browser's site data removes it.
Your child's crystal critter (its name, which they pick from a list, never type) and any postcards they save are also kept on your device. A postcard is a picture of their build, created on the device. Tessik never uploads it. On an iPad, saving it opens the iPad's standard share sheet, where "Save Image" puts it in Photos; any other sharing options there belong to the iPad and follow your Screen Time settings.
The one thing we do count is anonymous visits. When the game loads it creates a random code on the device, with no name, email, or any personal detail attached. It sends that code when the page opens, and again when a player reaches a few steps in the game (opens a world, places a first block, hatches their crystal critter, saves a postcard, a villager moves into a home they built), plus the general kind of device (phone, tablet, or computer, nothing more specific). That lets us see how many people play, where new players get stuck, and whether they come back. It's aggregate only, can't identify your child, is never sold or shared, and clearing your browser's site data resets it. That's the extent of it.
Beyond that anonymous count, Tessik collects no personal information from anyone — so there's nothing for us to sell, share, or lose. This is deliberate: it's the simplest way to keep a kids' product safe and to stay on the right side of children's privacy rules like COPPA.
On an iPad or phone you can add Tessik to the home screen so it opens like an app, full-screen. It needs an internet connection to start. Installing it doesn't create an account or share any data. Step-by-step iPad setup, including locked-down iPads
We're happy to hear from grown-ups. If anything here is unclear, or you'd like a world removed from your device and aren't sure how, reach out and we'll help.
Contact: [email protected]