Field trip needs 6 drivers and 2 chaperones — open slots, parents claim.
(Or open an existing one.)
On the event detail, toggle Signup slots.
'Driver · 6 spots', 'Snack · 1 spot', 'Chaperone · 2 spots'. Add as many rows as you need.
The event appears on every family's stream with an RSVP-like widget. They tap a slot to claim it.