"Stuck in the mud"

One of Evan's favorite books right now involves a Red Tractor pulling various and sundry animals and people out of a mud pit. Now everything is "stuck in the mud." His toy train gets stuck in the mud. Diego gets stuck in the mud. His blue truck gets stuck in the mud. The other night, Evan sang me a couple songs before nite-nite with this reoccurring theme:

"monkey, monkey, monkey, feet, stuck in the mud"
"doggie, doggie, doggie, stuck in the mud, fall down!"