Make drainage holes in the bottom of the bag and cut out three squares in the top in which to plant the Tomatoes. Water often and feed once a week. Push a bamboo cane into each square and loosely tie the plant. As your plants grow, pick off side shoots and some of the flowers to create lots of big tomatoes. You can also grow Marrows, Courgettes and Runner Beans in Grow Bags.
Smaller children love to get really messy.
But you can turn it to your advantage by getting them to help you with digging, weeding and watering. Soon they'll be merrily collecting them in jars. Because they compete for food in the soil, it's a good idea to pull them up. Some weeds, like dandelions, have deeper roots than others and are a bit difficult to dig up. Start with those which are easily lifted.