Yes, the outdoor environment is important to enhance too! Slide painting!
Worms Eye-View: OUTDOOR MARK MAKING. NUMBERS, LETTERS AND MATHEMATICAL CONCEPTS. EYFS LINKS
Simple Science learning - float or sink activity
Outdoor mark making area
frozen body paint for kids - great activity for a hot day!
Painting with sticks is an awesome idea for children to get used to different textures that they will create on the paper using the sticks
Backyard Design: DIY Outdoor Sound Wall/Music Station from Fun at Home with Kids Love this
Take Aim! I would stick or write the numbers on a wall and then use a wet sponge to throw at the numbers.
Wellie Boot Printing! - The Imagination Tree love this idea!
Children´s outdoor chemistry lab!