Kids can grow a lemon tree in their backyard or in a large pot on the patio. The flowers on the tree smell wonderful and kids can make fresh lemonade. Kids can use lemons to make lemon zest in many dishes to get an extra lemon flavor. First wash the lemon skin thoroughly. Kids can carefully grate the lemon skin, slowly moving the lemon across the grater, using the entire lemon. Kids can then cut the lemon in half and squeeze out the juice. To make lemon bars, preheat oven to 350 degrees. Line and cover the sides of an 8 inch square pan with parchment and lightly grease. Mix ½ butter, 1 ½ cups organic whole wheat pastry flour, and 1/3 cup organic sugar in a food processor or with your fingers until crumbly. Press into the pan and bake for 18 minutes and let cool. Kids can whisk ½ cup almond milk, 6 tbsp arrowroot starch, and ¼ cup whole wheat pastry flour in a small bowl until smooth and set aside. In the saucepan, kids can mix ½ cup almond milk, 1 cup of agave syrup, ½ cup organic sugar, ½ cup maple syrup, 2/3 cup fresh squeezed lemon juice, and bring it to a boil. Reduce heat and slowly whisk in the mixture in the bowl, cooking another 5 minutes. Remove from heat and add 2 tbsp lemon zest. Pour the filling over the crust and bake for 15 minutes at 350 degrees. Let cool, then chill in the refrigerator overnight. The next day lift the parchment paper to get the lemon bars out of the pan. Cut into 16 two inch squares. Kids can serve lemon bars for a sweet treat at a party and can be stored in the refrigerator for up to 10 days.