There are several. May I suggest Castle Galleries? It has free admission.
I'm wanting to go to a museum around the middle of Cambridge. That is perfect. Can I get the phone number, postcode, and address please?
{"__type": "Inform", "entity": {"__type": "Attraction", "choice": "several"}} {"__type": "Offer", "entity": {"__type": "Attraction", "entrancefee": "free", "name": "Castle Galleries"}}
{"__type": "Inform", "entity": {"__type": "Attraction", "address": "unit su43", "phone": "01223307402", "postcode": "cb23bj"}} {"__type": "RequestAlternatives"}
It's at unit su43, grande arcade, saint andrews street, postcode cb23bj, phone 01223307402. Is there anything else you need?