Try some of these

-Play football
-Put your big toe in your mouth
-Blow up a balloon without using your hands
-Play a board game using only your feet
-Sing "If your happy and you know it" with foot actions
-Tie a reef knot with your toes
-Do feet exercises
-Go on a long walk or bike ride
-Measure things in feet
-Draw a picture with your feet
-Walk in different shoes eg clogs, flip-flops with socks
-Walk barefoot thru nature eg mud, leaves, sand,