How it works
Kai's little sister Tess has a birthday on Saturday, and Kai opens his Spend jar, which holds 7 coins.
He thinks about what Tess loves most. Tess draws all day, and her sketchbook is full, so a new one is a good clue.
At the gift stall, a sketchbook costs 4 coins, a paint set costs 9 coins and a drum costs 5 coins. The paints cost more than 7, so Kai cannot buy them.
He picks the sketchbook, because it fits Tess and it fits his coins. A good present fits the person, and fits the coins in the jar.