The first shoots are poking through in our potato tubs! It has renewed Harry's interest in them and he is very keen to water them every day now.
We also looked at a picture of a potato plant and labelled the different parts.
Harry seemed really interested, as he generally is with farming related topics, so we talked about harvesting, watched some potato harvesting on YouTube and read this book, which is one of my favourites (although I am a fan of barefoot books generally).
There is a good section in the back which gives facts about a variety of vegetables.