Timeline is a game about time order and history for grades 3 to 6. A washing line runs across the top, past on the right and future on the left, and the child takes cards from the basket and hangs them in the right order.

• 73 levels across four grades, following that grade's social studies book

• Ordering on the line, a family album, "which is older?" and matching then with now

• Grade 3: yesterday, today and tomorrow, my life story and family generations

• Grade 4: life then and now, and how we learn about the past from photos, objects, writing and memories

• Grade 5: ancient Iran: dynasties, founders, kings and monuments

• Grade 6: from the Samanids to the Qajars, Iranian scientists and poets, capitals and historic monuments

• Cards can be dragged, or placed with two taps

• No timer; the child goes at their own pace

• The child picks their own grade at the start

• A Persian narrator reads every instruction aloud

• Mistakes are never punished; the child is encouraged and carries on

• Works offline after install

About the first 40% of each grade is free forever, 31 of 73 levels. The free version shows child-safe Adivery ads: only between levels on the result screen, and banners outside gameplay. The full game is a one-time purchase of 99,000 Toman, no subscription; it unlocks every level, removes all ads, and counts toward Nikipoo School later. It is one of the 44 games in Nikipoo School.