Free sample · about 3 minutes · you play both sides
The Case of Grandpa Sol's Missing Trumpet
Grandpa Sol played trumpet in a jazz band in 1968. On Saturday he's meant to play it at Maya's school concert, but this morning the trumpet vanished from the hall closet. Grandpa has half the clues. Maya has the other half. Neither can crack it alone.
Or play it on two phones
Send Grandpa's half to someone (a grandparent is perfect), open Maya's half yourself, then call each other and solve it together.