Mods, please move if in incorrect sub forum. In a couple of weeks my 6yo son and myself are heading to Monmouth on holiday by rail. Was just contemplating a break of journey and see there is the two museums mentioned in the title which could be suitable. Does anybody recommend one more than the other for 2-3 hours before we head onwards. It will be a Monday, and I note it is just an exhibition day at Didcot. Any advice gladly accepted. Thanks.