Unlock the labs
Paste the license key from your Gumroad receipt. All 8 Kindergarten labs open on this device.
All 8 labs are unlocked on this device
The key is checked with Gumroad about once a week when the labs are opened.
Where's my key?
It's on Gumroad's receipt screen right after you pay, and in the receipt email from Gumroad (check the spam folder). It looks like XXXXXXXX-XXXXXXXX-XXXXXXXX-XXXXXXXX. Lost it? Look it up at gumroad.com/license-key-lookup.
Using the Chrome extension?
The same key works there. Open Kindergarten Science Labs, tap Grown-ups, answer the grown-ups question, open Unlock and paste it. The extension counts as one of your plan's devices.