Learning Shapes With Toy Cars. Create your own shaped road tracks using black sandpaper. Teach your toddler or preschooler their shapes with a triangle, square, circle, rectangle, pentagon and octagon road track.
PHONICS: EYFS phonics - Treasure & trash game at the water tray. Phase 3 real & silly words written on the balls for the children to shoot down the guttering into the appropriate bucket.
Pirate Math Fun for Pirates Past Noon (Magic Tree House book).
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.