Reddit mentions of Touch Screen Pocket Scale 200 Gram X 0.01g Digital Scales US Balance Absolute

The folks at Modernist Cuisine discovered the sweetest of tricks, which is that the addition of sodium citrate to melted cheese stabilizes it and keeps it from re-hardening. This means that you can make a sauce or dip that has the consistency of alfredo or nacho cheese or Velveeta or cheese whiz, from any cheese including delicious high quality ones, and get a stable, creamy result that still maintains all the delicate nuance and strength of flavor of the good cheese you used to make it. You can also use a variant of this recipe to make American cheese style slices that melt easily but taste like, well, real, good cheese.

on Amazon:

sodium citrate, enough for a long time, $15 and free shipping

a digital scale that measures in hundredths of grams, $36.60, free shipping

immersion blender, $15.83 and free shipping.

This puts you at roughly $66. If you decide you want to throw a few more bucks into it, or he already has an immersion blender or something, get him some nice cheese to melt.

... If you wanted some non-food-related ideas, I love this product and have just been waiting for the right occasion to give this to someone.