The lab
The simulators run in your browser, with invented data. They never ask for or keep private keys, seed phrases or real wallet data. Ever.
These are educational exercises. They do not show what could happen with real money and guarantee nothing.
A practice wallet: an invented recovery phrase (clearly marked "DEMO — DO NOT USE"), transactions between fictional wallets, confirmations, fees and what happens if you get the address or the network wrong.
It accepts no real key or phrase.
You receive simulated messages, DMs and sites and decide: legitimate or fraud. For each one you get a score and an explanation of the signs that should have stopped you.
No account, no personal data.