B.M.
Hi T.!
Its probably a phase. I recently stopped nursing (19 months!) and I seem to remember around 11 or 12 months, we had the same issues with being silly during nursing and changing.
What I did was when he was screwing around is to tell him to stop kicking or fidgeting and then if he didn't, I stopped nursing him and set him on the floor. He eventually realized that nursing time was not play time and he stopped.
With changing, I think I just incorporated songs and goofy faces to keep him focused on me and not trying to wiggle too much.
I know its a trying time, but "this too shall pass." If you can make it through this "phase" you will be much happier!!
I hope this helps!
B.
(fellow Shaklee mom!)