Visit the Royal Botanic Gardens, Kew. This is a fantastic World Heritage Site, about 30 minutes from central London. You will have the opportunity to view galleries, walk in a beautiful garden of glass and green flowers. Explore the Water Lily House for gigantic lily pads, have fun in the Temperate House which is the world’s largest glass facility built in the Victorian era and finally discover the ten climatic zones as you pass in the Princess of Wales Conservatory and Palm House rainforest, all in the same setting. Entry ticket goes for £14.50 per adult.
Visit London Zoo in the leafy suburb of Regent Park and explore over 760 species of animals. You will have enough time close to a gorilla in the African Forest here and have fun with penguins at the Penguin Beach among other pleasures. Entry is only £16.60 per adult.