Boy Shorts- sizes 6-12 mo, 12-18 mo, 18-24, 2T, 3T, 4T, 5T - $20
Lounge Pants- up to 4T - $27
I do not have a boy but if I did this seems the perfect boy fabric.  The fabric, designed for Michael Miller features cars and street signs. Colors include red, green, blue and yellow on a cream background.  Love it!
These have an adorable folded hem around the bottom of each leg that makes them feel just a little more dressed up.
The perfect shorts for playing in!

Here is a version for fall and winter...the lounge pant which features the same folded hem and a wide leg.