What can I do with my sister, brother in law and 1 year old neice at the weekend?

[tajmahal]

I live in Devon, the weather should be quite nice, but I don't know what to arrange that would be fun. We could hang out in the garden but it might be nice to go out and about...

[Rise again Wat Tyler]

Isn't monkey world quite near you? It'd be nice for your niece if she doesn't fall asleep. It also has a pets corner where she can hold the animals I presume
The eden project?

[Kay K]

hey, take your niece to a water park or Amusement park, picnics and whatever pleases her. In the night, go to dinners, clubs, whatever! enjoy n tc