1) Take one outdated, giant, well-worn freebie t-shirt from an Baltimore Orioles baseball game and cut it up
2) Sew it back together to make a tiny, adorable toddler sized shirt
3) After waking up from a nap, show him his new shirt and let him flip out with excitement that "mamma made a new shirt from daddy's old man shirt".
He really was incredibly ecstatic about this shirt, he had to wear it immediately, quickly asked for his Orioles hat and then to go somewhere to show it off. My son is usually excited to see what I make and likes to see me wear it all, too, which is the sweetest thing ever. But later tonight when he saw an old store-bought shirt he'd outgrown, he demanded to wear that one instead.
I used a raglan t-shirt pattern from Sewing For Boys and appliqued the logo on the front. The directions calls for this to all be raw-edged but I did it the old fashioned way with my serger and some twin needle top stitching. This was a freebie shirt from a baseball game so the fabric isn't the highest quality, making me nervous that it would fray or fall apart!