Every child decorates a stone and then adds a weatherproofing varnish. What an amazingly welcoming display! School counselors - could make it a great lesson on diversity & add stones to our school garden
Magic wands ~ early years These would be fun to make!
Backyard Design: DIY Outdoor Sound Wall/Music Station
Backyard Design - Outdoor Sound Wall/Music Station for Kids : Children may listen to the different sounds outdoor.
Investigating real and fake money by using magnets - fabulous water tray activity
Great for mathematical development: Take Aim! I would stick or write the numbers on a wall and then use a wet sponge to throw at the numbers.
Slide Painting Activity
Slide painting - using gravity to make art GG
Worms Eye-View: outdoor mark making
plant pots would be good for storing stones, bark, sticks, shells etc outdoors as they have drainage so wouldn't matter when it rains
For the final playhouse
Sink or float experiment with nature
Sink or float experiment with nature - Laughing Kids Learn
Wellie Boot Printing
30 Months - The Imagination Tree: Wellie Boot Printing!
using loose parts to make faces in the rain, this activity can engage the children and to let them express their feeling in that moment.
Frozen Paint Summer Activity for Kids
Frozen Paint Sensory Play for toddler, preschool, and elementary age kids. This is a great summer activity for kids - one you will want to add to your summer bucket list.
Painting on easels or on large rolls of paper on the ground
Create a Simple Outdoor Music Play Area
let the children play: 5 ideas for outdoor music play
DIY Kids Water Wall by playingbythebook via curbly. this is more about play, but I think something a little more durable with this same idea might go well in the sideyard garden/play area.