What digging in the dirt does to you

For the labor day weekend, we made no extravagant plans in fear of crowds everywhere.  This morning we went for a nice long play time at the park.  By the time we came home, Joshua was already quite exhausted from digging in the sandpit all morning.  Even with his favorite food (i.e. noodles) on the lunch menu, he gave up eating after a few bites and let the sleepiness take over.