I thought it would be a good idea to take my DS(9) on the train to York in August. We're going to do all the touristy things like the Jorvik centre and the Railway Museum as well as walk the walls, etc. DS is autistic and has pointed out that a holiday is only a holiday if it has some sort of waterpark/playground/activity centre involved. I wasn't planning on taking the car so can anyone tell me what we could do that's within reach of the city walls?