No, I'm not going to tell you how to make a tall child - your folks should have done that a while ago ha ha!
I'm going to show you how to lengthen a pair of kids jeans by adding a contrast panel - works a treat on my boy's trousers! He's tall and skinny, and is at least a year size smaller in the waist than he is in height, and his trousers either fall down round the waist and fit him in the leg, or fit him in the waist and look like 3/4 lengths - fine in the summer, not so good now winter's on the way!
So here goes....
First, get a couple of pairs of trousers, preferably different shades or colours so the panel contrasts.
Then, around the knee, draw a line across the pants that you want to add the panel to.
and cut along the line!
Lay the two pieces on top of the other pair of jeans, and measure how much you need to add in to get the right length.
and cut a panel from each leg to the size you need.
Then you just need to stitch them together! Turn the contrast panel inside out, and slide it over the bottom of the top of the jeans (does that make sense? lol!), pin, and stitch. You can also top stitch at the stage, but I didn't on these as I didn't have a red thread to match the topstiching on the rest of the jeans.
Then do the same with the bottoms of the jeans, turn right side out, and press!
Eh voila - pants that fit! Both ways!
Thanks for looking!