How do you get your baby to sleep if you're out, but not moving?! DC2 is 4 months old & is ready to have a sleep after about 1.5 hours of being awake. He naps well in his cot at home, but if we're out he'll only nap in the pushchair if it's moving. Which is a problem as my DC1 is a toddler so we're often out at toddler-groups, soft-play etc, and I can't keep his pushchair in constant motion! I've tried reclining it right back & using a snooze-shade, but he just cries. Any tips? If he doesn't nap he gets unbearably tired and grumpy!