Things to do?

Hi,
I am travelling here on 5th July with my husband and 2 children (aged 5 & 1). Can anyone give me ideas of things to do while we are in Bulgaria? PLaces to go, places to visit, family days out etc?
Thanks
I am travelling here on 5th July with my husband and 2 children (aged 5 & 1). Can anyone give me ideas of things to do while we are in Bulgaria? PLaces to go, places to visit, family days out etc?
Thanks