Here is a great Sunny Day idea from Miss Baikie: ☀️
She has a little activity to inspire you to explore the rays of sun and the wonder of Science outside – Shadow Drawing.

You’ll need some paper, pens or pencils. Can you find an interesting object, maybe your favourite toy like a dinosaur, or you could use your hands to be creative and make different shapes – or even your whole body. You can try it at different times of the day as the sun moves across the sky and see what different patterns it creates.
– Do the shadows stay the same?
– How do they change with the time of day?
– Do your objects’ shadows change size?
This link will give you  a bit more information:
https://kidsactivitiesblog.com/137133/how-to-make-shadow-art-with-kids/

You could also try taking some shadow pictures with a camera:

We look forward to seeing how your investigations turn out.
Maybe you could also use some sticks to make a frame for your artwork. All you need is 4 interesting sticks tied with string, and then decorate your frame with any natural materials you can find outside, like leaves or loose flower petals etc.
Have a great fun in the sunshine!