Crazy 8 is a great website for children's clothing, everything us $9.99 and under.  But, right now they have a great deal.  They have marked down some of their tees to only $3.99.  I took a look and it looks like boys tees, to me.  Here are a few of them:  

Speed Demon Motorcycle TeeSuspender TeeHot Dog Eating Champ Tee

New Markdowns on tees, tanks, skirts and more! $3.99 and under at Crazy 8!