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 스크린 샷

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.