I love the map + stickers and handbag ideas. will try those.
we usually travel after 7pm, the dds are more likely to sleep and the traffic is lighter so journeys take less time. we use story tapes/CDs a lot too.
have tried the "sweet every 15 minutes if you're good" trick but it's sort of spoilt by constant discussion of how to tell the time on the clock. i thought this would inspire the dds to tell the time. but it seems not. it just causes them to obsess about sweets.