The event is taking place from 1pm on Saturday, July 31.
There will be a raffle, including a prize for a short break for up to six people in Devon, and lots of other prizes.
Other entertainment will include a tombola, children’s lucky dip, cake sale, and a competition for the best decorated children’s cup cakes.
Albie, who will shortly celebrate his second birthday, has been diagnosed with what specialists believe to be a Rhabdoid tumour - a very rare aggressive form of cancer.
Parents Leanne and Chris face daily trips to Bristol and sometimes London with Albie, so that he can receive chemotherapy, radiotherapy and physiotherapy.