Too hot outside

It's going to be breaking 100 this weekend so I've come up with some ideas to keep the little one and me entertained:

a) Flower Math
b) Gumball Run
c) Pick blueberries
d) gather pinecones to make bird feeders
e) "wash" windows with paintbrushes and water
f) run through the sprinkler
g) slip 'n' slide
h) spray painting (spray bottle from the dollar store, 2 pieces of paper, some water, & washable paint. Mix the paint in with the water, and let him loose.)
i) giant bubbles
j) Sidewalk Chalk Paint: Simply mix 2 Tbsp Cornstarch, 2 Tbsp Water and 5 drops of food coloring. Paint with craft sponges or those paint brushes with sponge tips
k) Make blueberry muffins
l) Solar powered lunch
m) make crayons