Try it free
One full lab, no sign-up.
$0
- Push the Ball! (K-PS2-1*)
- Every line narrated
- Badge and printable lab record
One payment. Every lab in the pack.
Push the Ball! is free to play right now. Kindergarten Science Labs unlocks with a single purchase - no subscription, no account, and updates to the labs are included.
Family
For one family at home.
$19 one-time
- All 8 labs, and updates to them
- Every child in your home
- Up to 5 devices
Unlocked on this device
Classroom & Co-op
For one class, co-op or tutoring group.
$49 one-time
- Everything in Family
- One class or co-op group
- Up to 30 devices
Unlocked on this device
Secure checkout by Gumroad · card or PayPal · tax added where it applies · 30-day refund
Compare
Which plan is right for you?
| Family | Classroom & Co-op | |
|---|---|---|
| Price | $19 once | $49 once |
| Who it's for | one family at home | one class, co-op or tutoring group |
| Devices | Up to 5 | Up to 30 |
| Labs | All 8 | All 8 |
| Updates to the labs | Included | Included |
| Refund | 30 days | 30 days |
How buying works
From checkout to science in a minute.
- 1
Pay on Gumroad
Gumroad's secure checkout opens in a new tab. It takes the card or PayPal payment and adds sales tax or VAT where it applies.
- 2
Copy your key
Your license key is on the receipt screen and in the receipt email.
- 3
Paste and play
Paste it on the Unlock page. All 8 labs open on this device; repeat on your other devices, or in the Chrome extension.
Questions
About buying
What does it cost?
Push the Ball! is free - no sign-up. The other 7 labs unlock with one payment: Family $19 (one household, up to 5 devices) or Classroom & Co-op $49 (one class or group, up to 30 devices). No subscription, and updates to the labs are included.
How do I unlock the labs after buying?
Your license key is on Gumroad's receipt screen and in the receipt email. Paste it on the Unlock page of this site (or in the labs: Grown-ups → Unlock). All 8 labs open on that device straight away.
What counts as a device?
Each browser where you enter the key - for example Safari on your iPad and Chrome on your laptop count as two. Clearing the browser's data uses a new slot when you enter the key again; if you run out, reply to your Gumroad receipt email and we'll reset it.
Does my key work in the Chrome extension?
Yes, the same key unlocks the free Kindergarten Science Labs extension for Chrome and Edge. Open it, tap Grown-ups, answer the grown-ups question, open Unlock and paste the key. The extension counts as one of your plan's devices.
Can I use it with my class or co-op?
Yes. The Classroom & Co-op plan covers one class, co-op or tutoring group on up to 30 devices. Labs work well on a classroom screen for a whole-class launch and on tablets for centers. See the page for teachers.
What if it isn't right for us?
Ask within 30 days of buying for a full refund - just reply to your Gumroad receipt email.
Who handles the payment?
Gumroad, a payment platform for independent creators. It's the merchant of record: it takes the card or PayPal payment, adds sales tax or VAT where it applies, and emails your receipt. We never see your card details.