DC 8.5 months and I do loads - even if I just want a quiet afternoon 
Out and about
We go to groups - rhyme time, messy play, music group, bumps and babies, toddler group - check out your local surestar centre/library.
We visit; the local cafe which has a play area, the library to look at books, the local free museums.
We go swimming, to the park, the supermarket [where we go to the toy/book aisles]
We go to the local wildlife space and bird watch, feed the ducks, chat to the dogs, watch the cows.
We go on day trips to the lake, zoo, local mini railway.
We go on playdates to friends homes