Apps in this category may contain mild or occasional cartoon, fantasy or real-life violence, as well as occasional or mild adult, sexually suggestive or horrifying content and may not be suitable for children under 9 years of age.

12+

Apps in this category may contain occasional mild indecent language, frequent or intense cartoon or real-life violence, minor or occasional adult or sexually suggestive material, and simulated gambling, and may be for children under 12 years of age.

17+

You must be at least 17 years old to access this App.

Apps in this category may contain frequent and intense offensive language; Frequent and intense cartoon, fantasy or realistic violence: frequent and intense adult, scary and sexually suggestive subjects: as well as sexual content, nudity, tobacco, alcohol and drugs, may not be suitable for children under 17 years of age.

Howtosmile Screenshots

iPad

iPhone

About Howtosmile

howtosmile —the best science fun anywhere, any time, any age!

Find and DO fun hands-on science, math, engineering and technology (STEM) activities created by the country’s top science centers and out-of-school educators. Explore for FREE the entire howtosmile collection of over 3,500 activities, games, experiments, and more. Search the whole collection by word—like sound or planet; by topic—like Cooking, Chemistry, or Climate; by cost to do the activity—from free to over $20; and by age—from 4 to adult. Read the howtosmile blog for fresh ideas and approaches, plus profiles of out-of-school educators who make science learning cool and exciting, whether they teach in a museum, classroom, an afterschool program, or a kitchen at home. Discover your new favorite hands-on activities to do with your friends, family, or students. Get inspired!

Funded by the National Science Foundation, the Camille & Henry Dreyfus Foundation, and Oracle. Brought to you by the Lawrence Hall of Science, University of California, Berkeley.