Every day at 11am Maddie Moate (from CBeebies Do You Know?) is doing a live broadcast on Youtube. These are all science based. The first week was on the garden and the second week is on the body.
If you look at her page you will find links to each one and you can either watch live or catch up later on.
There are some ideas about what you can do outside to look after and find out about nature on this link:
James Brunt is an artist who uses materials that he finds outside to make pieces of art with. If you look at some of his art with your child you could then have a go at creating something with sticks, stones, leaves etc outside.