Looking back

It's my cousin's 60th birthday weekend this weekend and I have been looking through old photos to share with family. I have found some crackers! 
My dad took loads and got them developed into slides.I remember a viewer and my sister and I used to love looking at them. Years ago I got a lot of them put onto a disc for my Mum.
This is one of me and my sister.She was about 2 and I was 5/6. I think we were on holiday in a caravan.
Happy days.