Even a simple walk in the park and https://argoprep.com/blog/what-is-digital-literacy-and-why-does-it-matter/ will help the child learn more about ecology. Pay attention to what trees grow around, what condition they are in, how the leaves are removed, whether there are bird feeders and squirrels, whether there are enough wastebaskets near the benches, etc.
A trip to nature is another way to combine business with pleasure. 
You can arrange a garbage collection competition: each participant is given a package, whoever collects the most garbage in 10 minutes wins.
You can continue your acquaintance with flora and fauna by visiting the Natural History Museum with your child. There he learns about endangered or extinct species of animals and plants. Such an excursion fits perfectly into the concept of ecological education of preschool children, since the main reason for species to be included in the Red Book is human activity.