User login

  • New at-home activities collection | We have added new, specifically designed activities that will help caregivers and educators support at-home STEM learning. Check out the curated activity collection and framework here!
  • New vaccine resources | Read about new hands-on activities on vaccination and viruses created by The Lawrence Hall of Science and co-developed with youth.
  • Museums offering at-home activities | We are updating a list of museums that are sharing new online engagement resources during this challenging time—check it out here.
  • Our awards | We have been recognized by Homeschool Base,, the American Library Association, and the American Association of School Librarians.
  • Explore our topic pages |  Not sure where to start searching? Try browsing activities organized by popular subjects and frameworks—like astronomy.

Welcome to howtosmile

Search almost 3,500 of the very best STEM activities on the web. Find handpicked activities from your favorite science museums, public television stations, universities, and other educational organizations. All activities are available to anyone, free of charge. Start searching now and filter by age, material costs, and learning time to find exactly what you need for your educational program, class, or family.

After launching in 2010, and serving millions of web visitors, howtosmile has become the largest and longest running online collection of STEM activities for educators and learners from all over the world. Let us know what you think and send any suggestions for new resources by emailing us at

Curated Topic Pages

Latest Blog Post

Vaccine Confidence Resources from The Lawrence Hall of Science

by: bishoplm | 6.28.2022

"Last year this COVID-19 scared me. It’s not so scary when you’re doing science about it with everyone." This quote from a youth participant captured one of the ambitions of new activities developed by The Lawrence Hall of Science as part of the Communities for Immunity initiative.