My grandma had a similar handwriting and I think it says "Mina ja Lucy tämä on otettu meijän haussisa."
Google translate says it means: "Me and Lucy, this was taken while we were having fun."
No, wait, the s is in the wrong place. Wow, Finnish is a fun language. Just moving the s around to change haussisa to hausissa makes it "Me and Lucy, this was taken in our house." Maybe?