6 free tools
Interactive puberty tools
Free, private tools that make puberty easier to understand — no sign-up, no data stored on our servers.
Body Changes Explorer
Slide to any age and see which puberty changes are typical for girls or boys right now.
Open tool →Period Predictor
Estimate upcoming periods from the last start date. Private — nothing leaves your device.
Open tool →Myth or Fact? Quiz
12 quick questions to test what you really know about puberty.
Open tool →First-Period Kit Builder
Build, check off and print a school-bag period kit.
Open tool →Conversation Starters
Age-matched, low-pressure openers for parents and caregivers.
Open tool →Puberty Glossary
60+ puberty and health terms explained in plain language.
Open tool →