I went several times and can highly recommend it. All you need to do is to take your own lunch and a few quid (Think it was £15 - maybe a bit more now) if you will want a frame - they provide the materials and, certainly at Battle, tea and coffee. Bob Ross paintings are sneered at by art critics...
I did this mention this years ago and haven't been for a few years myself but if you have £48 to spend on someone near Worthing or Battle and want to give them something unique then a painting session with Paul and Terri is good
http://www.paulandterri.co.uk/
That includes tuition, paint and...