Ever since I saw these I had to make some for Will (of course, nearly everything on that blog makes me want to replicate it, but with the pants I knew I might succeed!). I used my beloved Oliver + S sandbox pants pattern, but skipped the pockets and the waistband. Really nothing much left resembling the sandbox pants! I just think they're a good basic shape. Although the size 2T for Will (he is getting awfully close to 3) is a bit on the short side, but it may just be my poorly caculated revisions to adding length to the legs in place of the waistband. Luckily I have more of the Children at Play stripes in the blue to make Jack & Will each a pair for next spring.
Since I have a serger & I trace my patterns onto freezer paper, these were actually produced on my aforementioned Bonus Sewing Night. By tracing clothing patterns I use a lot on freezer paper it saves me a lot of time. You iron it on to the fabric to cut out your pieces and then just peel it away when you sew. It works over and over again. I forget where in blog land I learned that trick, but it is one of the best!