playing conkers

Horse chestnut Aesculus hippocastanum conkers both in, and out of, their seed case

Horse chestnut Aesculus hippocastanum conker and spiked fruit

Horse Chestnut Aesculus hippocastanum tree showing typical growth form

Horse Chestnut Aesculus hippocastanum twig and conker with fruit peeping out from the spiky seed cover

Horse Chestnut Aesculus hippocastanum flowering spike or candle