I must say, it amuses me highly that the color of the Fun & Humor section is a piss yellow, which really goes well with the theme of the poem. That small tidbit aside, this is an endearing Senryu; it feels to me like it's the beginning of a tv sitcom episode! Great job!
Hahah...reminds me of my little one. I pick him up from school and the moment the car stops he runs out and I know where he is heading to! The funny part is when he finds the bathroom is occupied..hahah I like the imagery here :)