Ds is 4 and in reception.
Their new topic is growing and he came home the day they broke up with a bean to plant and a little pot and a letter asking us to keep a daily bean diary.
Well so far our diary has nothing in it! The beans take 7-10 days to do anything. Ours has started to sprout underneath the soil (prodded it to check) but nothing to see above ground yet.
Nice idea in theory but not great in practice.