maybe a bus and or train

Visiting Maine and staying in Kittery (beautiful state btw) was looking for a small souvenir and thought one of those might be the ticket. We were up in wells/Kennebunk area and saw one in a a shop with some small buoys (thought those were neat too) but the shop was closed and I have no idea where it was. But I was hoping there would be a gift shop or antique shop near kittery work have one.

First trip to Maine starts this week. We will be in mid coast region for 3 nights then 3 nights in Bar Harbor. But forecast has rain all day Friday and a good chunk of Saturday which are our 2 full days in mid coast. Want to go to Botanical Gardens somehow but what else to do in the rain?