My husband has to attend a conference for a week in Johnston in May. He asked if I wanted to come too and make a holiday of it. We would probably go to Boston and New York after Johnston. However, we have 2 children, 5 and 1 year old. I am trying to find information about Johnston and what there is to see and do there, in particular how would I occupy 2 young children for the 5 days my husband is working? I haven't found anything in my google searches and was hoping to get some tips from locals. Thanks!