We asked at the hotel which Bodegas was kid friendly and they recommended Tio Pepe (Gonzales Byass). Our kids (aged 7 and 9) enjoyed as the tour includes a train ride around the estate (about 20 mins) and had a good video giving the history of the group and explaining the manufacturing process. The tour ends with a tasting of 2 sherries (relatively generous portions of Fino and Pale Cream)- probably worth paying the extra for another 2 sherries and we added on the Tapas as well which was good quality and you can have extra portions which we did - good croquetas, tortilla and chicken. The Bodegas is right by the Alcazar and the exit right by the Cathedral so you can kill 3 birds with 1 stone. We spent about 2.5 hours there - around 20 mins video, 20 mins on the train then a leisurely stroll around the site - most of this out of the sun so pretty cool given was 40 degrees the day we visited. There are tours in English - there were only about 15 on English tour but about 50 on the Spanish tour - tour guide was knowledgeable and entertaining. Tasting then you can spend as long as you want - we supplemented the tapas and so had a light lunch there. Plenty of underground parking nearby.