Synergeion Build: Kids Logic

One "Really?" a day. A thinking game for ages 6-9. Instead of memorizing answers, your child learns to doubt what they take for granted, ask "why?", and check for themselves, side by side with a parent.

5 minutes a day: "Really?"
Doubt one everyday belief, predict what will happen, and when you can, check it at home. Your growth record tracks how often your predictions were right.

Weekends: Detective Play
Dig into one big question across five steps: observe, guess, test, note, and share. Capture your child's thinking with photos, drawings, or voice.

Imagine Play
"What if?", "These two are alike". Open up and connect ideas.

A record that grows
Your child's words and ideas gather in one place: play, heart notes, and "Really?" reasons, browsable by kind. Build a little each day and Naru the beaver finishes a boat.

What grows
Critical thinking through asking and exploring, curiosity to look again at the obvious, scientific thinking that predicts and observes and explains, and self-directed learning habits. A parent-and-child thinking game made for ages 6-9.

Safe by design
All records stay on this device and are never sent anywhere. Settings and records open only after a parent check (a multiplication gate). Korean and English supported.

One small doubt a day grows a child who thinks for themselves.

Recent changes:
This update makes thinking play more fun.

- Background music and sound effects.
- Tap Naru and Neti to hear them.
- Find Naru & Neti videos in Settings.
- Try it as much as you like, then unlock full access with a single one-time purchase. Not a subscription.