Pick a mission, then work through 10 money problems.
Mission level
Money game
This is for moving her progress to a new device or browser — she doesn't need any of this to keep playing here.
Copy this and open it on her other device or browser. It signs that device in as her (same name) and pulls her saved Coin Counter stars automatically. Don't retype her name into a picker on the new device — it'll say "already taken," since names are reserved once claimed. This link is the correct way to move her over.
2. Her progress code — an offline backup
A backup of just her Coin Counter stars, independent of the server. Copy it and save it somewhere safe (notes app, email to yourself) — you'll only need it if server sync is ever unavailable.
Paste a code you saved earlier to restore it. This overwrites what's currently saved here, so only use it when you're deliberately recovering a backup.