Sand and some beach toys/plastic bowls from kitchen etc
Water to paint patio, with a little watering can and some cups/bath toys in a basin to play outdoors rather than in bath, make boats to sail in a basin etc
Bubbles to burst
Lie on a rug and look at the sky - what shapes do the clouds make, how many airplanes, what birds are flying,
What nature is I the garden - birds, insects, butterflies, plants and flowers....
Plant some cress as it’s fast growing and check daily, plant other seeds that take longer
Build wooden blocks outdoors - build big towers and knock them down
Bring out cars etc (not tiny ones) or animals or books and just play outdoors - a rug may be useful for this to corral the space they use, and a plastic tub or 2 so DC can carry their own things in and out (as much part of the fun and takes time to distract them too).