About MarblePals
Two children share one device. Each brought five marbles to a chalk ring. They take turns to aim and flick a shooter. A heavy shooter rolls on through a knock; a light one bounces away. A marble that hits the wooden kerb leaves it at the same slant it came in.
The Commons Rule
Nobody keeps anyone's marbles. A marble that rolls out of the ring is set beside the child who brought it, never beside the one who knocked it out. There is no tally and no winner, and every game ends with each child holding exactly what they brought. Playing for keeps is not taught or named.
Changing a rule
Saysso lets the children pick one rule to change, and then waits until everyone has said the new rule out loud before it can be played. A rule is something people agree on.
How it behaves
No score, no timer, no winner. With reduced motion on, each flick jumps straight to where the marbles stop. Nothing is stored or sent.
What it does not claim
It is a toy for feeling angle and weight and for agreeing on rules. It is not a measured physics lesson.