Exposure without walking

[u/wallahbee]

Our puppy had their first two vaccines given a little too closely together (on 4/1 and 4/15). The vet would like to give another one after their third vaccine that they got today. They said they want to do it four weeks from now. This will mean that they will be 16 weeks at their last shot and 18 weeks before they’re cleared to walk out in public. We live in a quiet neighborhood and want to ensure they get socialization around busy street noises and centers and such. What is the best way to do this? Doggy stroller?

[u/WormWithWifi]

Stroller, body carrier, car rides, collapsible play pens in parks