Terms
Last updated September 29, 2026
The short version
Professor Otter is a library of printable activities for kids. The free activities cost nothing to play, print or download. We also sell PDF activity books, and spiral-bound printed books are coming soon. By using the site, you agree to these terms.
Free activities
Print as many copies as you like for your family, your classroom or your group. Please don't sell them or repost the files on another site. Share a link to the page instead.
PDF books
A PDF book comes with a license for one household or one classroom. You can print as many copies as that household or class needs, and keep a backup. You can't resell the file, post it for anyone to download, or add it to a library shared with other teachers or schools.
Your download link appears right after payment. If you're signed in, the book also stays on your account page.
Refunds
PDFs arrive the moment you pay, so digital sales are final. If a file won't download or doesn't print correctly, email hello@professorotter.com and we'll fix it.
Spiral-bound books
Spiral-bound books aren't for sale yet, and the shop marks them Coming soon. When they launch, each product page will show shipping times and return rules before you pay.
Accounts
You don't need an account to play, print or buy. An account keeps your purchases and print history in one place. Accounts are for adults 18 and over, and kids use the activities without one. Keep your sign-in private, because you're responsible for what happens on your account. We may close an account that breaks these terms, for example by posting paid books for public download.
Payments
Prices are in U.S. dollars, and tax is added at checkout where the law requires it. A payment processor handles the charge, so we never see your full card number.
Our content
The puzzles, pictures, books and site design belong to Professor Otter. These terms give you the rights above to use them, and no others.
No guarantees
We work to keep the site running and every puzzle correct, but we provide the site as is. We can't promise it will always be available or free of mistakes. As far as the law allows, our liability for any claim about the site or a purchase is limited to what you paid us in the 12 months before the claim.
Privacy
See our Privacy page for what we collect.
Changes
We may update these terms. The date at the top shows when they last changed. If you keep using the site after a change, the new terms apply.
Contact
Email hello@professorotter.com.